Set up gets to "connect both devices" then won't connect

I’m setting up my brand new Fairphone 5, and trying to copy everything from my Huawei P20 with Android 9.

The process gets as far as telling me to connect a cable from the other device to the FP5, but then stops. Sometimes I get a notification on my old phone to allow access to the App Gallery, and then it opens my picture gallery, but nothing else happens.

Should I go back to an earlier step in the set up process and do the transfer another way?

Ah, I’ve got it going wirelessly by saying the cable doesn’t fit.