Can’t connect Instagram from Business Manager anymor

The new way to connect instagram accounts only allows me to add Instagram accounts that are in my Accounts Center, but I have full access to my clients facebook page and Instagram account. Before I was able to add clients IG accounts because I had full access, but now I can only add accounts that are in my Accounts Center, but the problem with that is that clients won't add their accounts to my account center because it can only be in ONE person's account center. How to I add IG accounts that I have full access now? Please help urgently