How can I get Edge to restore all the tabs I had open last session?

I can't seem to find the setting you're referring to close all Edge windows at once so this doesn't happen again.

⋯ (Settings and more) > Close Microsoft Edge

Edge keeps a copy of the last session; if you haven't closed the browser since discovering that your tabs were missing, it may be possible to find them again.

A good solution was to Add all tabs to new collection, but that seems to have gone away.

I am currently numb with shock. I lost dozens of tabs I needed to have open for reference. I never have more than one Edge window open and I've restored the tabs many times before but this time I didn't realise I had clicked on something that launched a popup new Edge window. Windows at this same time was acting weird with Edge open with all the tabs. So I closed the main Edge window using the red ✖ only to see the still open popup window. Closed that. Restarted Edge and can't bring back my tabs. This is a disaster. I can't seem to find the setting you're referring to close all Edge windows at once so this doesn't happen again. I'm still in shock.

Fixed with a reinstall.

The "Open tabs from the previous session" option seems to be having no effect for me. With three tabs open, I close Edge with the X. When I reopen Edge, I'm back to just one homepage tab.

Update to my previous note:

I've found a way to restore all my Edge for Android tabs in one shot, but ONLY because I sync Edge across my devices. I went to my Edge desktop browser and into History, recently closed tab list and found the following, all in a group conveniently, and restored them to a fresh browser window. Not ideal as this extensive set of tabs is no longer on my phone Edge browser but at least they're not completely lost. I'm sure with some work I'm not really willing to set time aside for, I could import them back onto my phone. Here's the quick screenshot. Hope it helps...