Hi, I dont want my old photos to show up on my Iphone, but I still want them saved in iCloud. Is there a way to keep old photos on Icloud, but not have them show up on my phone?

iCloud Photos is a syncing service. Any photo you delete from a device where iCloud Photos is turned on will also be deleted from iCloud and from any other device connected to iCloud Photos. You can potentially reduce the storage space required on a device by turning on Optimize Storage. See: https://support.apple.com/en-us/HT204264

Apple does not currently offer cloud-only storage for photos. If that is what you want or need, you may want to explore 3rd party options such as Google Photos or Dropbox.

Another way that photos may be on iCloud (if you don’t have iCloud Photos turned on) is via a backup of an iOS device. The only thing you can do with a backup is use it to restore a device or set up a new device. The contents of backups are not viewable at iCloud.com and if you delete a photo from a device it will not be included in future backups and will be lost.

hi there! if you have any photos in iCloud , it will shows these photos across all the devices. but if you don't want to show any old photos and keep it secure on iCloud, you can hide these photos into your photos app and it won't show in the photos album of your iPhone and these photos will be secured on you iCloud too. this is great way to solve your problem.

to hide any photo tap on the photo and then tap share icon , then tap Hide in the list of options.

Hidden photos are moved to the Hidden album. You can’t view them anywhere else.

To turn off the Hidden album so it doesn’t appear in Albums, go to Settings  > Photos, then turn off Hidden Album.

to know more in details you can visit this link 👇

https://support.apple.com/guide/iphone/delete-and-hide-photos-and-videos-iphb4defbde9/ios