All my imports are gone from phone after signing in with different account

Hi, this is most likely an account issue rather than your photos being deleted: Lightroom (cloud-based) shows the library belonging to the Adobe ID you are currently signed in with, so signing in with a different account will show a different — often empty — library.

Please try this:

1. In Lightroom on your phone, sign out, then sign back in with the original Adobe ID you used when you took those photos.

2. Connect to the internet and give it time to sync.

If the photos reappear under the original account, that confirms it. If they still do not show after signing back into the original account, please reply with which account type you used (the email domain is enough, please do not post your full password) and whether the photos were taken inside the Lightroom camera or imported from your camera roll. Thanks!