I have an active subscription of Light Room in my app store , but the app doesn't see it.
Tried everything, signing off and reinstalling, nothing has worked.
If you do see a successful subscription in your iTunes Subscription info, in iOS Settings, then please try using Restore Purchase inside Lightroom. See how: https://helpx.adobe.com/lightroom-cc/kb/lightroom-mobile-in-app-purchase-issue.html
If you see no Lightroom subscription in your iTunes Account under Manage Subscription, then the purchase did not succeed.
If you see any error messages please share them here so we can help you better.
I have an active subscription in my iTunes, but restoration button is not working....
I think I see that you have more than one Lightroom account, and it's your other account that is subscribed. I will send you a direct message in a monent to share info with you more privately.