How to create an overlay menu/navigation for mobile?

This issue was already solved.

Hey mia!

Here is one you can take a look at:

Pixel geek made a video on this:

Here is one more video:

Hey Felix!

This is great - thank you so much for this.
To make it mobile only, I have to hide all the elements on desktop and keep them visible on mobile only, is this correct?

Thank you again,

Yes this is correct.