I was using Opera Beta and opened a lot of tabs, unfortunately it's a website that somehow made Opera use a lot of memory and it got killed by the OOM killer.

After reopenning Opera, only 2 of my 4 windows got restored, with no way of restoring them, nor any traces of the lost tabs in the history.

I only have a backup from last Sunday (6 days ago).
Is there any way to recover all those tabs from Opera itself or should I consider them forever lost and restore from the backup?

Browser info (translated from Spanish):

Opera One (version: 121.0.5600.12)
Updates channel :beta
System: Fedora Linux 42 (KDE Plasma Desktop Edition) (x86_64; KDE)
Chromium Version :137.0.7151.27