Is there a blending brush setting in Photoshop like in the example provided?

So I've been a Photoshop user for drawings for a good three or so years, and a few weeks ago I got Clip Studio Paint. I think they both have their pros a cons from each other, but there was one brush (or specifically brush setting) in CSP that I hoped might be in Photoshop.

So in this video here at 20 seconds in the artists selects the smooth water-colour brush which can add paint, but if stroked lightly it only blurs already existing paint. But in a more subtle and controllable way than the smudge or blur tool, which in my experience are a little unwieldy and often look messy for shading. I tried this smooth water-colour brush for shading in a recent drawing and it was one the easiest and most efficiant and good-looking ways of gradient shading I've done.

I'm not quite sure which setting or, more likely, combination of settings allow the brush to do this. But, I was wondering if there was a selection of settings or, better yet, a defualt brush or downloadable brush (like one of Kyle's brushes) that do this function?

Many thanks in advance. 🙂