Mod said i can't speedrun Zelda VIA emulators, what do i do? Why is it banned? May i get some help?

Emulators allow for cheaters to easily access cheats. They are banned in most games because of that. Some emulators have add-ons as well, which makes it different from the original game and therefore they can not be used in speedruns. Some games will allow emulators, but most will not.

Edit: also what @SioN said

from your pfp i assume you mean breath of the wild specifically. the reason is that the emulators for modern(ish) consoles arent accurate enough.