Answer:
I've tested your function on a test sheet and it returns an empty content.
According to an answer at Google Sheets importXML Returns Empty Value , IMPORTXML can not retrieve data which is being populated by a script
and it is a limitation. Unfortunately, I have checked that when Javascript is disabled for the ecosystem.lafrenchtech.com site in Chrome browser, the table never loads. Thus, this confirms that the table is being populated by a script and this is the reason why it returns an empty content.
A possible alternative solution is to check if the ecosystem.lafrenchtech.com
offers an API, where you can directly get the data that they show from their table using an API key (if it is available). However, this will require you to use Apps Script to parse the data from their API and then post it on your spreadsheet, which would be quite a tedious for a quite simple process.
Note:
On your post, google-slides
was the set tag.