Which Muay Thai gyms in Bangkok, Hua Hin, or Pattaya offer DTV visa sponsorship and access to regular gym equipment without the requirement to spar?

Your better off looking in Google these people are just guessing. Contact the gyms yourself by phone or email get correct info before you start.

I go to a chill gym on Koh Lanta, there are a couple with gym access. You don't have to spar if you don't want to; note it's also nothing like boxing or dutch kickboxing etc. MT sparring in Thailand is meant to be learning and light; the fighters have actual fights so often that sparring is more play as no one is getting paid to do anything where they could actually get hurt. That being said, you'll also have to not escalate/cool a partner down if they are more aggressive than you'd like - this is pretty unlikely to actually come from a Thai vs foreigner as well.

Great gym for any level, they assisted with my DTV

Rage fight academy in Pattaya next to Jomtien great gym great coach

Check Tiger Eye, Bangkok.

You can tell any Muay thai gym in Thailand clearly you don’t want to spar, and you won’t have to

Fight EVO360 Thailand - Thepprasit Boxing Stadium in Pattaya has all the paperwork and great for DTV, not sure what all they have in the way of gym access ... Most condos have a functioning gym.