My presets disappeared

I doubt if you would have much luck, but you can try this:

https://helpx.adobe.com/uk/lightroom-classic/kb/recover-lightroom-mobile-photos-itunes-file-sharing....

Alternatively, do you back up to iCloud, and if so, one option could be to wipe your device and restore from a backup previous to the Lightroom 5.4.0 Update, which I think was August 18th?

This though may not be as smooth as it sounds and could lead to other non-Lightroom issues.

Or maybe use a spare device and restore from an old iCloud back up and see if that works?

Hi there,

Sorry that your presets and images in Lightroom mobile app have disappeared after the recent app update.

This is a known issue and our engineers are currently investigating the issue.

Please checkout this discussion and share your  subscription status so that we can track the issue: https://feedback.photoshop.com/photoshop_family/topics/lost-my-pictures-and-presets-after-update-today-18th-august-2020

Note: Regardless of whether or not you are subscribed - do not uninstall the app!

Thanks,

Akash