Different number of photos Lightroom mobile and Lightroom Cloud (abo version)

Hi Fritz,

Thanks for reaching out. We are sorry for the trouble with Adobe Lightroom mobile & Adobe Lightroom desktop. We are here to help!

Could you please confirm the version of Adobe Lightroom (Help > About Lightroom) and Adobe Lightroom Mobile? Could you please confirm the type of images you are working with? Are they JPEG or RAW? As a test, have you tried creating a test album or adding flags or ratings to any images, and did they sync? Have you recently imported a large number of images?

Please ensure both Lightroom apps are up to date and connected to unrestricted internet and apply some changes like flags or star rating, which can kick start any sync issues.

You can also log on to Lightroom Web (https://lightroom.adobe.com) to check current Sync issues on the left part of the screen.

If there are any sync issues, click on them to know more, find the original for those images, and back them up safely before you empty the Sync issues from Lightroom Web.

We hope to hear from you soon.
Thanks!

Sameer K