Data transfer glitch (or so it seems)

My new iPhone 13 Pro arrived today. I chose to transfer data from my "old" iPhone XR by the Quick Start method. I kept my two phones near one another until I had a message on my XR telling me that the data transfer was complete. That was about four hours ago. My iPhone 13 Pro is activated, but all the apps that I had transferred from the XR still appear as "Loading" on my 13 Pro. No progress has been made at all. In the meantime, I have prepared my XR for a trade-in, so it no longer has my data on it.

Both phones had iOS 15.

What can I do now to fix the situation? Thanks!