I'll be honest, I don't think Feralheart is exactly polished or stable enough for a Steam release. I don't mind the idea though, but if it were to be put on Steam, that'd require a lot of reworking to make things easier to setup, as SpicyDirt mentioned. and yeah, I definitely don't think Steam or its community would be too happy about a game that requires an in-browser login page to play. Some people already think that's some kinda virus trap lmao, I guarantee that'd bring bad reviews on Steam
Steam would also come with your standard trolls for a while, you might get increased frequency of raids and whatnot, being a free furry game on a giant gaming platform. It definitely could also bring in genuine players at the same time though. Idk, lots of benefits but it'd be a lot of work to make it a game worth putting on there.
I use Steam for 98% of my games so like I'd appreciate it ngl