Hello,
I believe this has been a global issue since the beginning of the season, where villagers don’t unlock new trades. As far as I’m aware, it has been reported, so will hopefully be resolved at some point in the future.
However, I personally don’t believe it’s a high-priority issue, as villager trading doesn’t really effect any of the gamemodes too much - so, it may be a while before this is dealt with.
Sorry for the inconvenience!