I'm pretty sure in D&D they call both sexes minotaurs. Minobous would technically make more sense for a girl, but nobody knows what that means. And we're looking at etymology based on countries that probably don't exist in your setting.
In general, you don't want a player to loser their powers. But if you can turn the threat of losing their powers into a plotline, then that's awesome. Warlocks losing powers for breaking contracts is bad. Warlocks having to fend off eldritch repo folks for breaking contracts is good.
I think you should be able to make unarmed attacks against ghosts. After all, you have a soul. There's a ghost fist inside your flesh fist. You should be able to hit them with that.
If you allow that magic platemail, any magic item should work. Save all your useless and cursed magic items to use in fights as improvised weapons. That also means there's no a reason people would be keeping cursed weapons for you to find in their loot.
Assuming you're knocking them out first, their best bet is Magic Missile targeted at themselves. It won't miss, and it's enough hits to kill them instantly. The players could use Dispel Magic to get rid of Contingency, but Glyph of Warding protected by Nystul's Magic Aura would be a bigger problem. Luckily, Nystul's Magic Aura only works on objects, not surfaces, so make sure to move everything not nailed down. Alternately, use an antimagic field, and then carry them out of their lair before dropping it.
The lich could also have a task force to find and destroy their petrified body. Ideally you toss it into a Demiplane, or better yet, True Polymorph them into something with a really low Wisdom, then Imprison them in a Hedged Prison and destroy the special material component. But that takes high level spells and you'll need to rest to get them back or bring the statue to someone that can cast them.
But if a lich is smart enough to set all this up, it's still easier to try to get around it than go after their phylactery. Though you may as well try casting Demiplane and look for a plane where the contents are the lich's phylactery, and the purpose is to hide the lich's phylactery. It's probably also going to contain a ton of traps, which will either go off or prevent you from going there in the first place because you didn't guess all the traps.
It still works that way. Though they do take any extra damage, so a low level Wizard could be killed in one hit. Assuming the DM doesn't give them death saves.
There's nothing wrong with borderline rule breaking. The problem is when it's OP. It's fun to reward them for thinking outside the box, but if players find a technique that they could use constantly to great effect, it just becomes a new, smaller, and more boring box. So you either don't allow it, or if players don't mind not being strictly consistent, only let it work once.
"I'll never give up my grandfather's axe. But the handle does need replacing." Swaps out the handle with the one from the +1 axe. "You know, the head is looking a bit scuffed up too." Swaps the heads.
From what I can find, Threads has 10 million active users, and Mastodon only has 1.7 million. Threads may have been a "massive flop" in that they're not doing as well as hoped and the userbase is declining, but it's still far more popular than Mastodon, which also has a declining userbase outside of some recent spikes.
Don't they have to give birth first?