I went to try the Pidgin Facebook plugin, and I couldn't login. There's no more app passwords as the plugin suggests, if you try to login without the 2 factor Facebook sends "Is This You?" notifications every time, but doesn't let you login if you say yes.
There's github issue[1] for it and no resolution, except a weird python script hack to do 2 factor which may or may not be reliable.
https://pidgin.im/plugins/
BTW, OTRv3 has pretty poor security these days, there is OTRv4 but it isn't ready for users yet.
https://bugs.otr.im/otrv4/otrv4