We have received a request from the WMF-Communications team to enable the TagManager plugin on our Matomo instance.
The initial use-case is for managing the tracking data of the wikimediafoundation.org website, although it might be used more widely across other sites on Matomo.
The TagManager functinoality is already built into our current version of Matomo, so it is only a matter of enabling the feature.
This ticket is tracking that request and any changes made as a result.
In addition to the TagManager plugin, we have an outstanding request to enable the Marketing Campaigns Reporting plugin, under T319013: Enable the Marketing Campaigns Reporting plugin for matomo.
We should review whether or not that is still desirable and whether it should be expedited.
As a side-note, I have been sharing information with @SCampos-WMF about the Metrics Platform and pointing out that this is likely to be the preferred framework for instrumenting all of the Foundation's websites, over time. Given this FAQ entry and this ticket: T318832: Modify the JS Client to be used non MW powered sites, right now might be a good opportunity to start thinking about getting wikimediafoundation.org onboarded with the Metrics Platform.
In the meantime, the effort to enable the Tag Manager functionality in Matomo is low and the benefit to the communications team could be large.