UE5 Preview Player start

hi so ive been using ue5 unrelesed for a while and just upgraded to ue5 preview and now it doesnt just spawn a thirdperson character it spawns a player start and i dont know how to change that please help

I could not fully understand the question, but when you create the project as a thirdperson, it should start with this character.
If you add it to the project later, you can choose thirdperson from the World Settings section.

These videos of mine may be helpful to you.