maybe you just steal the brush mechanics from Procreate

[Julia04]

The Brush Studio interface divides into three parts: Attributes, Settings, and Drawing Pad

 

A Procreate brush contains a Grain (texture) inside of a Shape . When you draw a stroke with that brush, you are dragging that shape and the texture within it along a pathway.

You can set a Taper on that pathway so that your strokes start thin, reach full thickness, then tapers off again as you finish the stroke. This mimics the behavior of physical brushes and pencils.

Apple pencil has great possibilities. Even in ordinary notes on the iPad, the pencil works better than in affinity.

and you can combine two brushes into one in Procreate! Let’s still there brushes mechanics))
 

[konstantnnn]

I would DIE if adfinity used ordinary notes’s technology (actually called Pencil Kit and can be found in the screenshot ui, for example). There’s a wonderfull app called Ink (from the same developer of “Noto”) that uses pencilkit