While I suppose this could be considered a form a meta gaming, I very much hope it is not frowned upon, as it is for the positivity of the game world, the players and well everyone. We are all here to play.
I think it can be especially hard for those in europe, as prime server time is always going to be at unsocialable EU hours, and big plots tend to hit around those times for maximum player impact. Which is entirely expected and understandable, no complaint there.
Just try to seek out those you see consistantly around the same times as you. Not being around can spark RP as you seek out people to catch up on events, so try and turn a negative to a positive.
https://www.sindome.org/bgbb/open-discussion/anything-really/sindome-on-a-budget-1080/