Hickory: From what I understand (I don't use Galaxy) the overlay is only available if you subscribe to the alternative beta update channel in Galaxy.
Calmmo1: I was on the alt beta and it was out of date. You're stuck in pre expac - pre 1.10 (1.08.4 to be exact)
The beta channel has been updated to 1.10 for a few weeks now. It took about 3 days for the beta channel to be updated to 1.10 after its release. The only problem is that it is still on 1.10, not 1.11.
Kobi_Blade: Galaxy Patches =/= Witcher 3 Patches
One has nothing to do with the other, the only thing Witcher 3 Patches can bring at max is compatibility with Galaxy Features.
Galaxy has it's own Patches and Features though.
So just because Witcher 3 was patched, doesn't mean Galaxy was.
As for overlay, there's no overlay whatsoever yet, only a popup for achievements in the beta Galaxy branch, nothing more.
Mostly true, just a small correction of your wording. You say
"As for overlay, there's no overlay whatsoever yet, only a popup for achievements in the beta Galaxy branch, nothing more." Truly it is not a patch to Galaxy that adds the W3 achievement overlay, it actually is a patch to the Witcher 3. Because of this, switching to and from the Witcher 3 overlay beta channel in Galaxy requires a reinstall of the Witcher 3 each time.