My main is on @miku@miku.みんな since it's the instance I own, I can give a invite code to you if you want a alt there, I use mikutter.hachune gentoo-p frequently though since it's for my phone.
I'll go check session. I don't use social.miku or social.moe, those are probably imposters bacause I never made account over there. (I do have a vocalodon)