Force saving NBT's attached to player Capability

I currently have a capability and everything I want to do with it setup correctly. I want to make it clear my capability works, persists through death updates correctly and all that. What I'm trying to do is force the NBT data to save at a time besides exiting the game/dying. I've tried to look at the super methods for saving but I can't grasp how exactly it's functioning. The reason I'm trying to do this in the first place is that I'm trying to make my mod-compatible with a modelling mod known as "Figura", and it's able to read the NBT data attached to a player for use in players models. Currently players can't actually read the new values because it doesn't save to NBT until death or exit.