How do I backup my iPhone SE to my old Macbook Pro Mojave?

I'm a senior citizen and an old retired photographer. When I shoot now it's all volunteer so I have an old version of Lightroom & Photoshop on my MacBook Pro and it's running on Mojave. The work I do now is for free.

I'm trying to backup my old iPhone SE to my MacBook and I only see the name of my phone & it was downloading old photos and STOPPED! I want to back up he phone because my daught just bought me a new iPhone 16 Plus and I don't want to lose the info from my old phone like contacts etc. Any help would be awesome! Thank you!