That network was an absolute dumpster fire, but the Circles feature was really neat and I think it should've become a staple of social media. For anyone that doesn't remember it, you could sort your mutuals into different groups and you could make posts only visible to those different groups. You could also change your profile's appearance based on which group was looking at it (which is something I wish Telegram could do tbh).But yeah, I'm not really sure what a good solution is for ya.
Most of your art gets cross posted on both here and Meow, so I don't think it's a big deal to just urge people to follow your Meow even if they are ABDLs and just make it clear that this account is a personal one.