Late reply too but thought I'd chime in since I stumbled upon here too, hahah.
As someone who had ED IG a couple months ago, I found similar accounts when I followed nothing but thinspo (models/fashion/people like Eugenia C.) and had my bio saying my stats like "tw ed sh, ugw XX cw YY". You'll be recommended with ED and SH accounts soon enough. It's a slow trickle that builds up over time. Trying searching up "tw ed" and click on the users tab, you might find some people who are on public and then you can check their followings/followers. Most accounts are on private but people will generally be more receptive to follow you if you write that you're "active [month] 2021".
If anything, you can find whatever content you need faster on Tumblr (with that oh-so iconic concerned pop-up) or Twitter (#thinspo, "proana", and "tw sh" will get you stuff instantly, no warnings given lmao).
super late but i thought i'd add my two (pretty useless) cents-
i don't know of any specific tags but i think ur best bet is just to find some individual ed acct handles and then follow along from there?
i absolutely get so annoyed by insta hiding all of the content- at least tumblr still lets you though lol. does anyone else get a sudden influx of "ed recovery and positivity!" content pushed onto their explore pages after they search for a tag like "thinspo"? normally goes away after one or two days but it really makes me feel like i'm being watched haha
Same, hahah. I know it's the algorithm doing its thing but that doesn't mean I like insta hiding stuff or shoving recovery/positivity at my face. It's nothing but annoying because most of us just want a place to peacefully vent and post thinspo with people who understand what we're going through.