For 30-40 ppl raid
You may need open Vuhdo settings ==> Tools to change activation conditions
The UI is KkthnxUI, https://www.curseforge.com/wow/addons/kkthnxui
The 'Panel 1" in the image will not occur while in use
My other Vuhdo settings:
5 man dungeon https://wago.io/SydZmKfKM
10-25 man raid https://wago.io/Hk6skFztM
DPS raidframe https://wago.io/ByYdH_GYM