Instances window arabic fonts

I hope to answer a number of observations:
In “instances window” is supposed to be so Display Arabic Fonts.

-No inclusion : dotlesskaf-ar and dotlesskaf-ar.fina in the list of components.

-What is the benefit of this Anchor : caret_1?

That is for caret (=cursor) placement in ligatures. To my knowledge, it only works in TextEdit.

This is Anchor exists with glyphs : lam_alef-ar and lam_alef-ar fina explained to me the way it works here? Please.

the caret_ anchors are used to calculate the ligature caret position: scroll down to ‘Ligature Caret List Table’