I love the added difficulty and integration but the mod doesn't appear on my bar i made sure the mod is on and that the cloth api is there too i deleted and downloaded the mod again but nothing

Might be fixed with 699a933

I have the same issue, I'm playing on 1.17.1, using a dedicated server running the world.
The temperature indicator never appears unfortunately

Might be fixed with 699a933

Out of time reasons I only develop further on the latest version so my only recommendation is to update the mod.