Modders (luckily) keep finding a way. It's just unfortunate for the player that having Facebook as an owner means they need to show more good will in preventing the distribution of custom songs so they don't get held accountable for piracy.
I paid attention to the dev discord servers for a few months after the acquisition when they were churning through new mods when the old ones broke and people gave up on trying to maintain them, but haven't checked it recently. I would expect there's probably working mods still, but it's also probably a lot harder to keep them working over time.
FB's official stance on modding is that they will support mods that don't engage in "piracy or illicit modding, including mods that infringe on third-party IP rights". [1]
