New project does not have prior changes published to main branch.

Summary:

I created a project (say project1) in VBS for the HCM extension for redwood migration tool and published it successfully. I see the changes on the pages outside the project. So these changes are on the main branch per my understanding.

Then I created brand new project (say project2) for HCM extension. The changes I published in project1 do not show up in project2. The rules on the pages in project1 are not present in project2.

I understand we should stay in one project. But I wanted to confirm my understanding. Since the changes are in main branch as part of publishing project1, should'nt the main branch in project2 have the changes? What am I missing here?