Full story ... I needed the certificates to debug an app, So I registrated my personal Apple ID and paid $99.
Two months later, when app was ready and tested using TestFlight, my son registrated another account as a company. Unlike personal ID, a company needs DUNS etc., so a process is not so fast as for personal ID.
After my son gave me admin rights in company's account, App Store Connect began to show a switcher in right top corner and I can select between my private and company's account. I switched to company's account and made new certificates. Then uploaded latest release to TestFlight.
Can't say exactly, which rights are required for final step (to move from TestFlight to in App Store). Probably, 'administrator' is enough. In my case final steps did my son, I even did not try. Reasons: 1) I am lazy 2) my son had more experience (he published before another apps and knows, what Apple wants).