Why can't I find a function in the ad settings to send new ads for moderation?
Where is this feature enabled?

Cheout Item Validation PLUGIN.

Cheout Item Validation PLUGIN.

And what does the plugin have to do with it?
In version 3.0 - 4.4, this function was by default in the ad settings.
Why is it not in 8.0.?
Why did you make it a separate plugin?
Return it as it was.

Show me please 

Show me please 

Easy! Look!
Always this function of moderation of new ads in all versions except yours 8.0.2
Why did you remove it? 
Sorry that the panels are in Russian, but I think you will translate.
And so, you lost, give me your moderation plugin for free, I'll put it on 8.0.2

@AccepT
Sorry cannot translate so no idea what is written here.
Osclass 8.0.2 has long journey from last released Osclass version from Spanish guys.
https://github.com/osclass/Osclass
https://github.com/osclass/Osclass/blob/master/oc-admin/themes/modern/items/settings.php

I do not see option that would tell about listings moderation by admin.
Only available option was always validation by user via email link.

I installed the English language to prove once again that the function of ad moderation has always been!
Waiting for the plugin.

Not part of osclass 3.6, 3.7 or 3.8.
If it was there before, it was removed for some reason.
Osclass evo is something different. They might fork they work on older osclass version.
I suppose you have not installed Osclass from link I sent you.

Not part of osclass 3.6, 3.7 or 3.8.
If it was there before, it was removed for some reason.
Osclass evo is something different. They might fork they work on older osclass version.
I suppose you have not installed Osclass from link I sent you.

What are you proving to me that wasn't?
It has always been, and in Eva and Modern in version 3.8.1 - 4.4.0 Here is a download link for you, download, install and see for yourself.

I installed your 8.0.2 and am building a website on it, and also found that there are no URL in the categories. and where is he? How do I change the address of categories? Or are you going to tell me that he wasn't there either?

And you also made a separate plugin for the mandatory photo for advertising, and even paid. What for?
add to functions.php template code:

function req_item_img_required($error, $item) {
    if(empty($item['photos'])) {
        $error .= _m("Добавьте фото к объявлению .") . PHP_EOL;
    }

    return $error;
}
osc_add_filter('pre_item_add_error', 'req_item_img_required');

And you don't need a plugin.

Send you link to osclass 3.8 github.
Not there.
Evo is fork, they might try to add this, but obviiusly it was removed maybe in 2011-2013, most probably because this functionality was not suitable to be in core and was missing important features.

Back to your question - nothing was removed in last 5 years (minimum), but osclass is opensource with open code.
You can add whatever you need or cooy it from orevious versions if you like/need it.

Moderation will nit be part of osclass now or in future as its not feature needed by majority and require a lot of sub-features to be fully functional.

And you also made a separate plugin for the mandatory photo for advertising, and even paid. What for?
add to functions.php template code:

function req_item_img_required($error, $item) {
    if(empty($item['photos'])) {
        $error .= _m("Добавьте фото к объявлению .") . PHP_EOL;
    }

    return $error;
}
osc_add_filter('pre_item_add_error', 'req_item_img_required');

And you don't need a plugin.

Nice, but you probably need also front-end validation, configurable min count etc... So here comes plugin.

Good!
I proved to you, clearly, with screenshots and links, truthfully with all the evidence that the moderation of advertising was in the early versions, was 100%
The fact that you deleted it is your right.
Well, we will work on what you have done.

And so, where is my moderation plugin? waiting.)

And the question of URL categories remains open.

Admin can still moderate in 8.02 but not in the way plugin does. In Evo and 3.8 osclass version from others the link is actually acting the same as in osclasspoint v8.02 only the text has been corrected.
Where 'admin can moderate' text was in other versions ....text is replaced with 'notify admin when a new listing is added' ..... Meaning admin still receive an email saying someone posted a new listing. If admin does not like the new listing he/she can still edit / block or delete in admin - listings - manage listing.

Happy holidays 

There was always a notification of a new ad. In all versions, nothing has been changed here.
We are talking about moderation of new ads, until the moderator allows, the ads are not shown.
It was a very convenient feature.
In 8.0 it was removed and a plugin was made, that is, what everyone had before for free, due to the greed of the creators of 8.0 suddenly became paid.
Am I asking you to bring this feature back or give me the plugin for free?
It's the same with category URL. Or return the function of editing category URL, or give a plugin that can do this?
I don't understand why, for what.... was it necessary to cut out these necessary functions?