Missing tooltips (Alt Text) for Ai and PDF imports


InDesign 21.6 - Windows 11 - Local.
When images are imported in Ai or PDF formats, the Alt Text does not appear as a tooltip on the accessible PDF while it is present for JPG imports.
The control on Acrobat mentions the presence of the Alt Text for Ai or PDF imports but does not display the tooltip.
Is it a technical constraint, a forgotten step or a lack to be corrected on the app? In the case of constraints, it seems tedious to me to have to transpose all the Ai or PDF imports into JPG.
Thank you for your feedback.
