From what I understand, no. Maybe that’s a feature that will be introduced later on, but for now there’s no way. I hear people suggesting to make accounts on multiple instances, but that wouldn’t solve the problem that if the instance dies, all your content and account die with it. If you want to have the most control over your data, you should set up your own instance (where for example you’re the only user) but that obviously requires time/energy/know-how