I've deleted photos from lightroom and its also deleted from my tablet.

Hi there! Two things to explain here:

1. The tablet deletion is expected. Lightroom's cloud library syncs across all your devices, so when you delete a photo in Lightroom on one device, it's removed everywhere — including your tablet. It's the same cloud copy, not a separate one.

2. To recover them: deleted photos stay in the Deleted folder for 30 days. In the Lightroom app (or at lightroom.adobe.com), go to Photos and open the Deleted album, select the photos, and choose Restore. They'll go back to All Photos and their albums.

If the Deleted folder is truly empty, the photos were most likely permanently deleted already (or deleted more than 30 days ago), in which case they can't be recovered from Lightroom. One last place to check: if you originally imported them from your tablet's camera roll/gallery, the originals may still be there — deleting from Lightroom doesn't touch the camera roll copy.

More details here: https://helpx.adobe.com/lightroom/desktop/using/restore-deleted-photos.html