I agree, I have the M1 Mac mini, iPad mini, and I'm looking to replaces my S10e with a 12/13 miniIf I were buying a phone, I'd be tempted by a mini iPhone and iPad mini as a pair.
I wouldn't want a lower spec. camera but, for many purposes, I'd be happy for the better camera to be on the iPad.
And I'd want tight integration options - the iPad being able to permanently use the phone's cellular connection, and various sync options (e.g. open Safari pages, files).