Reopen all windows from last session

[Nikkigme]

I’m looking for help reopening a last Safari session. I have it set to- and it always does, it opened the last session after rebooting but it’s missing one. I really need it back and I don’t know where to look for it?
Any suggestions
Thanks

 

[Gregg2]

If you were on the missing page recently, you should be able to find it in History.