Can you confirm you're using InDesign?
I don't see the same options on my InDesign panel.
Oh yes.. oh my such a long time since I've used it I must have forgotten.
If it's not working as intended try resetting your preferences:
The easiest way to reset everything is to delete the InDesign preferences: as soon as InDesign starts to boot hold down Shift, Alt, Ctrl (and Apple/Cmd if working on a Macintosh). A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog.
Further info and instructions here if needed:
It is working for me - forgot this feature even existed... silly me.
Can you show the selected object in your Layers panel?
Maybe something's odd with the element you want to apply the dashed stroke?
( ACP )
Hm. Very odd indeed.
I wonder if the inability to edit the values for dash and gap at the bottom of the panel are because of a new feature of InDesign, that I for example left at default values, I mean User Interface Scaling that can be found in the Preferences. You may look into that.
Perhaps reset all options to their defaults:
( ACP )