Basically the same as the following two,
however, it's 2022 and I deleted a project with Google Cloud cli several days ago, and tried to create another one with the same name/id now, but it is still not available/working.
How long do I have to wait, and where / how can I check such Google Cloud "internal cache records"?
When you delete a project, you can recover that project within 30 days (undelete). That means the Project ID is not available until the project has been permanently deleted.