Photos on Mac not syncing

It's been more than 3 hours and photos from iPhone are not synced on the Mac version of Photos.

They are uploaded on the iPhone version of Photos and the iCloud.

I've been connected through wifi and a personal hotspot. Everything else is working (emails are syncing etc.).

I've spent 45 minutes on two calls with Apple support and at the end, I got "you should be connected to power by a cord and give it 24 hours to sync". I mean... seriously?

I've made those 40 photos using the iPhone at home and then went to a cafe to edit them. As I used to do with my old Dell and OneDrive.

Any ideas?

Thank you