I would like to see integrations added for the mod mentioned in the title.
I confirm it is available for the latest Minecraft version at the time of writing.

About the mod

Link to the mod page (e.g. on CurseForge): https://www.curseforge.com/minecraft/mc-mods/tough-as-nails

Tough as Nails (TaN for short) is a mod which aims to make survival more difficult. Part of this comes around in a Thirst mechanic which requires the player to drink water (provided they aren't on Peaceful). Previous versions of the mod, ones made for versions of Minecraft prior to 1.16, also had a body temperature mechanic. The body temperature mechanic will not be added back into the mod until 1.17.

Link to mod source/API: https://github.com/Glitchfiend/ToughAsNails

What should be integrated exactly

Do vampires still have to drink water? I don't think that makes sense, so if a player is turned into a vampire they should no longer have the TaN Thirst need. If that seems a bit heavy-handed, an alternative would be to restore some TaN Thirst when a vampire drinks blood.

I can help with

I am not confident enough in my abilities to say I could help with anything.

Additional comments

None that I can think of.