• You might be able to upload just the photos you want to iCloud, instead of linking your phone (and all within).
    Sign in at iCloud.com and it should be separate from the local phone copy.
    Not tried it that way myself but may well work.

  • You can simply export the photos you want to share to a directory on your iCloud path.
    Then share that directory.

    Had to do this for some wedding photos last year when I discovered Photos Shared Albums were no longer uncompressed sharing.

    Now that the new phone is 48mp MAYBE they will up the quality of shared albums.

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