Hi,
I finally received my new Tozo T6 earphones and they are working well with all devices, Windows 11 included.
For those asking for Tozo's support e-mail address, apparently the forum is hiding it, but it is easy to find here https://www.tozostore.com/support (Tozo Store Support).
Now the funny thing: the day I received the new earphones, I tried again the old ones with Windows 11 and... they worked! I don't understand why, but they did work. Maybe there was a problem with Windows which was fixed in one of the latest updates...
That's interesting.
My T6's still do not work on WIndows 11 and I keep WIndows 11 updated. Perhaps connecting with the "good" T6s it made your Windows 11 "aware" of something or whatever that now makes it recognize the old ones. That's a sketchy explanation based upon what little knowledge I have of how BT devices are recognized and configure under the hood with Windows 11. :p
Regardless... I finally did get a full refund from Tozo after many emails. But they gave me the impression it was with some bitterness on their part. I'm a bit gun-shy to purchase another pair of T6's, so I will be looking to buy a make/model.