None of the asset extension finder works in AEM 6.5

I am trying following extension

https://experience-aem.blogspot.com/2020/10/aem-6560-sites-editor-asset-finder-set-default-folder.html 

I don't see the dropdown in the asset filter

I even tried the following https://github.com/moonraft-innovation-labs/aem-unsplash-integration

I have tried on sp11 and sp12, not sure anything changed since extensions were buitd

I have tested these extensions upto sp8, they seem to work fine.

Not sure if there is a bug which is preventing them from popping in latest service packs

all these extensions are based on

• Open aem-authoring-extension-assetfinder-flickr project on GitHub

As per the documentation from adobe https://experienceleague.adobe.com/docs/experience-manager-64/developing/extending-aem/customizing-page-authoring-touch.html?lang=en

Clientlibs allow you to extend the default implementation to realize new functionality, while reusing the standard functions, objects, and methods. When customizing, you can create your own clientlib under /apps. The new clientlib must:

• depend on the authoring clientlib cq.authoring.editor.sites.page
• be part of the appropriate cq.authoring.editor.sites.page.hook category

I have tried above as well, but don't see the dropdown for custom extension.

Even ACS commons has an extension audio asset finder. When I install the package, I don't see it in Asset finder drop down

https://github.com/Adobe-Consulting-Services/acs-aem-commons/blob/master/ui.apps/src/main/content/jcr_root/apps/acs-commons/authoring/audio-asset-finder/.content.xml

Any one experienced this issue?