@Elia_Munoz_Cobian - what level of admin are you? (admin on individual projects, for your team, or super admin for your whole organization) Also, what plan level does your org have?
The answer to those questions will influence your best path forward. If you are an admin on individual projects, you should be able to make changes to project info (including name and owner). You can set owner/other roles from the Project Overview tab.
When you remove users, their projects do not get deleted. I believe that you might be able to go in and claim their projects if they were the only admins, but I’m not 100% sure on that.
You might also want to support this thread: