I'm not sure if there are any DPS Druid specific ones, that build is niche enough that there probably wouldn't be chat groups exclusively for it. I'm sure you could ask around in normal Druid chat groups though. Furyion's Discord chat
has a Druid chat group if you want to start there, not sure how active it is because I don't have access to it as a Ranger
All it takes is one person to make an old chat active
you won't get any answers if you don't ask a question.
Also, don't forget you can always ask questions here in the forums.