Just updating this post with the information about checking the extensions (same information provided in the support ticket).
In order to verify the extensions you can run this command: "utag.handler.cfg_extend".
Here is an example and we can see that this command provides a list of the extensions running on the page. You will notice that the "id" parameter matches the extension UID in TiQ.
It is important to note that this won't include extensions scoped to specific tags. For those, you will need to verify if the tag scoped to the extension is loading but, unfortunately, you won't be able to see them in the console.
Actually, I believe this is related to the issue you mentioned at the beginning of the ticket.
"However, I don't trust entirely the numbers the extension gives me because often the number of Extensions running on my profile don't match with the ones that appear on the Web Companion."
Could you confirm if the extensions you do not see on the Web Companion are scoped to specific tags? If this is the case, you won't be able to see them on the Web Companion as well. Then, it is not really an issue, it is how the tool works.
I would recommend submitting a product idea in our forum to improve Web Companion to also display extensions scoped to specific tags: https://community.tealiumiq.com/t5/Product-Ideas/idb-p/product-ideas.
Hope this was helpful!
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