And pretty much google around 5th of every month , Samsung could be in beginning/Middle/end of each month nothing guaranteed.It'll get the update. My guess is that Google is ironing some bugs out for those particular devices. This is not the first time we've seen delays for the Pixel 6 line -- probably has to do with the Tensor chip.
"Going backwards" would be not getting updates for several months. That's not going to happen.