Hey there! Welcome to the forum.
I'm going to assume you are referring to normal map regen zones, which showtriggers_toggle in console helps you see. Note you will need to be in a listen server with sv_cheats 1 on.
The issue with that command is:
1. It's server-side, so it's either on or off for all players
2. It toggles on all trigger entities, so this includes teleporting zones, func_nogrenades and lots more.
So unfortunately there's not really a simple way for us to give a command like that to players. Let me know if you're referring to some other zone type though.