On Photoshop, do you use "Blend RGB colors using gamma?" (This on Color settings [Ctrl+Shift+K]> Advanced )

I had to look it up, but i did not have the settings turned on, but now I do. Thanks for the heads up, I wasn't aware of blending colors using gamma before.

I'd be interested in learning why you chose to use this setting? I've looked at different sources of information online, but am still not clear. Maybe it could be demonstrated in a future lesson/live stream?

yes, me too. As on adobe forums it is stated only to use when needed https://forums.adobe.com/thread/1056245