Change default themes in quick settings?

I have come to really appreciate the one-click light/dark theme in the quick settings, and I was wondering if there was a way to make changes to them.

They seem to default to Breath Light/Dark, which are good themes. But after playing around with Kvantum on my desktop, I was hoping to bring that to my laptop. I sometimes work in places with a lot of light, so being able to switch quickly on the fly is great. I tried the Plasma Configuration Saver, but that didn’t seem to work too well, and usually made my desktop look like a weird mishmash of themes.

Any suggestions?