Acciaccatura after note

FWIW, I can't think of any musically meaningful distinction that could exist between the two types of notation for grace notes after. The normal definition of acciaccatura is meaningless when applied after a note.

Seems I am not the only one looking for acciaccatura after :) Need help.

Just use a regular grace note after, which is more the standard / correct notation. There should not normally be a need to reproduce the specific non-standard notation shown in your example. But if you really need to do that for some reaosn, you can add it as a grace before the next note and adjust its position via the Inspector. Eventually, we could indeed add an option to make appoggiaturas *look* like acciccaturas or vice versa.

In Persian music notation it's used quite frequently. The symbol of acciaccatura is used for a certain ornament whether it's before or after a note.

I am notating a Godowsky transcription of a baroque piece where the Acciaccatura is after a semibreve (at the end of the bar),so I can't see a way to put it in front of the next note and move it with the inspector.

I found a workaround, a bit time-consuming though.
First add a grace note after, from the palette; then open the "general palette" (shortcut: z) and go to "symbols"; look up for the "slash for stem up grace note", add it to the notehead and adjust the offset accordingly. It isn't exactly identical to the "real deal", but to me it's close enough. See attachment

Fixed in branch master, commit 4a35b17b95

_Merge pull request #19569 from rettinghaus/fix/line-end

Fix #19165: missing line end on tempo changes_

Unrelated fix

I added the stroke to my Grace Note palette. As far as workarounds go, it's quite fragile as moving the measure layout will almost always separate the slash from the grace note. If you have a lot of them then it's a tedious clean-up job post setting the final score layout.

This issue tracker here has been discontinued so better report it again on GitHub

Here's another workaround I've found that finally works just fine. Add an additional eight note to the bar and make it invisible. Add an acciaccatura to the invisible note. Then move the barline to the left.

I tried to repro that but get an uncomfortable playback gap.