I think it's still open whether Logitech will release something here. Even if the "new" Unifying Receiver is already very small, USB-C is still a somewhat bigger hurdle. The fact that the MX Anywhere 2 now also has Bluetooth is probably a sign that Logitech sees this as the (medium-term) future.

It's 2022 and quite a few years since that question was asked, but sadly the answer continues to be "no".... :-(
The sad thing is that there are already people who have found a DIY solution that may not be particularly elegant, but is much smaller than any adapter: https://www.youtube.com/watch.
If someone can do it at home, then surely Logitech can do it too. I don't mind it sticking out 1-2mm further if there's finally a USB-C adapter for it. When I look at the innards, it should be possible without any problems. Instead, they seem to want to milk the business market with the Bolt products.

And now?

Is there any news here yet?