That is why I have completely degoogled my life. Backup your photos ASAP!
I'm using nextcloud as a google photos replacement. It's not quite as smooth as google photos but it works well enough and I control my data. The official app handles auto-upload of my photos. Yaga is a nice android client for viewing the photos on my degoogled phone. The web app works well for that too and there are even sharing features, so I can share an album or photo with friends, family, or whoever. Nextcloud has suitable replacements for notes, drive, docs, contact backup/sync, and more. It's a little bit of effort to set up but totally worth it to control my data and get privacy.
Fastmail is a great paid replacement for gmail. It has calander, notes, and file storage features too.
There are so many cloud storage options, really no excuse to use google drive.
There are other turnkey google photo replacements as well these days, amazon and flickr come to mind. Google has nice apps but it's just not worth being their product, especially since they nerfed the free storage.