Thanks for the quick reply, @Bhbp0955. Let me share some insights to help you show up the bill payment in your vendor's profile.
If you have created an expense transaction in QuickBooks Online (QBO), please make sure to select the Vendor account under the Payee field.
On the other hand, if you've just generated a journal entry for your recording process, ensure to select the Vendor profile under the Name column for the vendor's invoice payment line item of the journal transaction.
Otherwise, we'll wait for your screenshots to help us share a possible solution for this concern.
In addition, I'm attaching this link that can efficiently guide you in supervising your account: Learn about QuickBooks Online with how-to videos.
We're always here in the Community to help if you have other questions about your QBO account. Have a great day!