Where to download macOS Mojave (from switzerland)?

Hello,

I would like to upgrade from macOS HighSierra to macOS Mojave on MacBook Pro (Retina, 13-inch, Late 2013).

I can only find macOS Big Sur on the App store, no other version (and I don't want to switch to Big Sur for reasons of non-compatibility with my other devices (which are on Sierra and can't upgrade anymore...)

The links found on the apple website launch App store, but nothing happens.

Where can I find the installers for the old systems?

Thanks for your answers!

[Edited by Moderator]