How to sync pictures from iphone x to macos catalina?

Before I used to connect my iPhone x to my laptop, open Photos with the delete from phone option. This would move camera roll (new photos) off the phone and into my computer. I think pictures would be stored into the Photos Library in this step.

Then step 2, I would open iTunes, backup my phone to my laptop and that would sync them, which means the photos would move from the computer to my phone albums. I think pictures would now be taken from the Photos Library and onto my phone, specifically into the albums now.

This means in these 2 steps I would move pictures on my phone from Camera Roll to Albums and at the same time get a copy on my laptop as backup.

How do I do this on Catalina without iTunes?

I plugged in my phone, selected Delete imported items from device, the pictures got moved out of Camera Roll into mac Photos app. But how do I sync them back to my phone Albums?