Hello Surferking1,
Welcome to Apple Support Communities!
We can help you better understand iCloud so you can get the most from iCloud Photos and other iCloud services with us.
When using iCloud Photos, your photos are safely and securely stored in iCloud via your Apple ID. When signed in on a device using that Apple ID with iCloud Photos enabled, your photos will show on that device. If you delete a photo from one of your devices, then iCloud will also delete the photo, which means the photo will be deleted on the other devices as well.
This explains it also:
"How iCloud Photos works
iCloud Photos automatically keeps every photo and video you take in iCloud, so you can access your library from any device, anytime you want. Any changes you make to your collection on one device change on your other devices too. Your photos and videos are organized into Years, Months, Days, and All Photos.And all of your Memories and People are updated everywhere. That way you can quickly find the moment, family member, or friend you're looking for."
This Apple Support page has the full details: Set up and use iCloud Photos - Apple Support
If you needed more storage for your photos, you could consider upgrading to iCloud+ for extra storage:
"How iCloud+ works
iCloud+ is Apple’s premium cloud subscription service. It gives you more storage for your photos, files, and backups, as well as additional features including iCloud Private Relay, Hide My Email, and HomeKit Secure Video support.* You can choose from three plans:"
Detailed here: Upgrade to iCloud+ - Apple Support
We hope this helps better understand how iCloud Photos works and your best options to mange your photos.
Please let us know if you have further questions.
Cheers!