Settings > iCloud > Find My > Find My iPhone > Find My network

Disabling it, won't you also lose the notification that someone is tracking you (like Android users) ?

P.S. I know about the beeping, but the speaker can be easily removed.

You can opt your phone out of participating, but of course that won't stop other people's iPhones and iPads reporting the position of any AirTags they see near you.

It's unfortunate that, even though your phone can leave FindMy, it isn't as straightforward as going into Airplane Mode. You certainly can't choose to disable it at certain locations.

Yep