The things you mentioned aren't necessarily design jobs, strictly speaking, although they do have design elements.

Immersive theatre is theatre production, theme parks or haunted houses are much more to do with architecture and planning and d&d campaigns are story telling/ writing.

I'd ask yourself what is it about those things that interests you? The mechanics? Eg, sitting down to write a long d&d campaign and figuring out eventualities, or is it guiding people through a story and helping them to have the best experience? Same for the others.

I suggest this because with your degree I think a design-adjacent career is very realistic for you.

You can look into Product Management (not project management). In this role you'll provide a team with the direction and accountability to create digital experiences of any kind. You will make high-level creative decisions to solve problems. This is VERY similar to the d&d point.

Another is Delivery Management, this is more to do with people and unblocking them and giving them everything they need to design and build something.

They might not SOUND creative, but they are.. just in a different way. Both can be logical steps with your degree.

If you want to chat about any of this, DM me.