Thanks for reaching out. We are here to help. I'd love to help you figure that out.
Could you please share the Photoshop version and the specific macOS operating system version?
Your operating system preferences determine the actual list of services appearing in the Share panel. You can tweak these preferences. On macOS, add/remove services to the Share panel by tweaking System Preferences > Extensions > Share Menu. Please check this documentation from Apple: https://support.apple.com/en-in/guide/mac-help/mchl8baf92fe/mac