What do you mean by selective sharpening?
If you mean paint in sharpening manually to particular areas of the image:
Duplicate layer. Sharpen top layer. Apply a (black) mask), then paint in white to the mask where you want sharpening.
Yes, I've gone to V2 - but there are not huge differences compared wiht V1, mainly minor user interface improvements. However, the main benefit is the ability to embed the original raw image in the file, so that you can do non destructtive edits to a raw file, rather than having the raw development "baked into" the affinity file.