When managing my organization, multiple accounts are displayed, which creates confusion when selecting a product. Currently,

I have 3 sites and cannot find a way to delete, deactivate, or hide the ones I am not currently using.
After exploring some options, I found the set of existing accounts in the billing section, but I cannot find a way to delete or deactivate them either.

When I check one of these accounts, I find that there is a product associated with a domain linked to another account (which I also manage).

Could you help me on how to clean up these accounts and make product management easier? Or centralize management in just one account?