Add features to Selection Layer

[Bud]

I've created a selection layer. Now, I want to add a few more features to the selection layer. Instead of deleting the existing selection layer and creating a new one, I want to add features to the existing selection layer. I'm not aware of a way to do that using existing OOTB ArcGIS Pro functionality.

GIS Stack Exchange: How to add item to an existing selection layer

[AlfredBaldenweck]

It'd be cool if select by location and select by attribute ALSO had the ability to append the selection into a selection layer.

(I think it's part of the same Idea)