Yesterday I updated my 15 Pro Max and my series 11 to 26.6, last night I tried to enable sleep focus and this morning the watch wasn’t showing me any notifications at all, while the phone had several.It's still an issue with iOS and watchOS 26.6. Sadly that means S6-8 watches will likely never have this fixed.
At this point, I don't think they're doing anything but security patching for 26.x. Among the ones I checked, they didn't even update the carrier profiles or baseband firmwares in iOS 26.6, which is rare for an x.y release.
So yeah, I can confirm that they still haven’t fixed this.
It’s really ridiculous for a company like Apple.