Awesome work, I just tested it using the instructions but It didn't work, the plugin wasn't added so I couldn't turn it on to test,
However I debugged it and found the issue, in the src/administrator/manifests/packages/pkg_weblinks.xml

<file type="plugin" id="weblinks" group="content">plg_content_swaggerui.zip</file>

We should add this line in the <files>, when i tried adding this it worked as expected.
Please check and let me know if I'm missing something.

thanks for checking, i didn't check the pkg_weblinks manifest file before now,
when locally i've runned .\vendor\bin\robo build i've only checked that plg_content_swaggerui zip file
has been added in the zip folder so i was able to install it directly ie. not thw whole pkg

dunno why it has not been added to the pkg_weblinks manifest file

are you familiar with OpenAPI Specification (OAS) / Swagger ?

No problem

are you familiar with OpenAPI Specification (OAS) / Swagger ?

Yes I've used it previously in some of my projects

after some internal discussion we have agreed that this shouldn't be part of core weblink package
i'll move it in a separate github public repository
anyway
if google give us a slot for this project
this will be an important task to have a successfull project

moved to https://github.com/alikon/testcom/tree/main/plugins/content/swaggerui