Recover GoodNotes data

I have accidentally deleted the Good Notes app... and all the journals that I have been creating are gone...

I have tried reinstalling the app but either the iCloud sync is not working or I have not taken a backup.

I have tried checking iClouds.com (even on advance settings) but there I couldn't find the Goodnotes data as well..

Is there no way of recovering the old data...? I have tried contacting the support center and awaiting their reply, but if someone can help would be great