Hello there, @kriths2001.
Welcome to the Community. I can provide some clarification about creating accounts in QuickBooks Online.
The system automatically creates the Trade and other payables accounts on your behalf. As soon as you enter a bill for your vendor with a different currency, QuickBooks records it in the Chart of accounts.
Please see sample screenshots below:
It's designed to ensure you have the necessary accounts for each currency you have. Since the ability to manually create is unavailable, I suggest entering the bills.
Additionally, here are some helpful references that you can check out about using multicurrency in QuickBooks:
I'm only a few clicks away if you have any other questions. Wishing you and your business continued success.