Did you already get the Grand Company Quest to do Darkhold?
Did you do your Relic quests already?
At 45 if you're really careful you can attempt to completely finish your class hunting log. It may be too difficult.
Grand Company logs also for seals and progression

Explore and fill out your map, it gives you some EXP and there are some really beautiful places I hadn't seen yet otherwise. I changed a setting in my character settings and when I zoom all the way in it turns 1st person. I explored for a while and took some landscape screenshots and made a little progress in the meantime. Fun to me!
Don't necessarily FATE grind if you don't like the repetition, but while you're exploring if one pops near you just take it for the boost!

It can make you anxious to be on those last few levels and feel like it'll take forever. Just ignore what level you are and have some fun if you can manage to log in!