Since I updated the theme, I lost the blog link in the menu of the mobile version.

On the other hand, I would also like to integrate a link to the forum and a widget at the bottom of main.php as is the case for the blog.

Thank you in advance.

https://superpet.tv

You can create child theme.

I looked at what a child theme was but it doesn't tell me how to integrate my links...

Well, not sure what to say.

which file is the mobile menu in please?

@David
Footer.php and header.php

Thanks

Now i've managed to integrate the link to the blog into the mobile menu but still can't do it for the forum.

For the blog, I integrated the following code in footer.php

Do you have an idea for the forum? Because copying and pasting the code identically by modifying "blg" by "frm" does not work ...

Simply check route for forums plugin in it's index.php or place link simply as it is on your site without using functions.
Like: https://plugins2.abprofitrade.eu/forums/home

solved with: <a href="https://www.superpet.tv/forums/home"> Forums </a>

Thank you very much !

now I have the question of importing it as the blog widget in MAIN.PHP