What Questions should I ask my direct reports in giving me feedback?

I’ve been at my job for exactly one year and I’ve asked for one-on-one meetings with my team (there are three members) to give me feedback on how I can be a better manager.

I’m looking for ways to improve, whether I’m addressing things that they need or that the team needs. All the team members were in place when I joined and from my point of view, I’ve worked pretty well with them. I do feel like I’ve built a level of trust with each of them.

I’ve specifically asked for it to be outside of the performance review process (not that I have anything against it, I just don’t usually find them very helpful), this is more informal, hopefully honest, and in the spirit of taking in feedback and improving my role as their manager.

So with that: do you have suggestions for questions or framing for my meetings?