So I, in a font with an italic angle, in the glyph parenright, can rotate the parenleft component 180° while still keeping it vertically balanced, while having auto-alignment activated.
I am setting a custom ascender for subcategory parenthesis.
Does this make sense?
I am attaching some images to make it a little bit clearer.
If you have a better solution, I would be happy to hear.
I found another solution. Add a *origin anchor to the base glyph. It is a bit tricky to know where to put it. Add a guide to the origin point {0, 0}, (not where the left side bearing hits the baseline, a bit to the right from there). Then set the guide to the italic angle. Add the anchor on that line and move it down. For me it was -151 unites.