Unable to backup iPhone SE1 to my Mac

My iPhone backup to my Mac no longer works.

I connect iPhone SE1 (15.8.3) to my Mac (15.2) by a cable. Finder displays the phone but does not display usual details. There is just a message "If you have problems with your iPhone, you can restore original settings."

I do not want to restore original setting, I just need to backup my data. I do not want to use a cloud, want to backup data to my Mac.

Thanks for help.