There are several ways to restore tabs and sessions after they were closed or have ended.
Assuming you werent browsing in incognito mode, thats where you could find the pages youve recently visited.
press the three dots in the top right corner of your window and go to your History.
The history option in the menu
Here, it’s possible for you to see the sites youve visited.
Clicking on one of them will open that page in a new tab.
you could even access tabs from other devices, assuming you were logged in with the same account there.
Recently closed tabs a quick way to reopen