I have W11 22621.160 and until yesterday I didn't have TABs in the new File Explorer too.
But today I wake up, turn on my laptop and...Voila, TABs are working.
I didn't do anything and nothing new was installed. I don't know what has happened.
Great discovery! Mine had a view issue (it doesn't show up), but it resolved for itself, after some days or some shutdown/startup cycle. But thanx anyway.
Thanx for your answers. My Widgets never show up completely. It's like a very slow internet connection (which is not), the ghost widgets keep trying to show but it never happens. And my internet connection (300Mbps fiber) is ok for everything else. Also, I have another laptop (Lenovo) with W11...