Hello @b h,
If you choose to transfer the site to another account, you will no longer be the rightful owner of that site. If you want for 2 accounts to be able to edit the same site, you can allow contributors on your website, which can edit and publish the site without owning it. Here's an article that can help: https://support.wix.com/en/article/inviting-site-contributors
I hope this helps!