Hi,
We have an Open Data Site, where we both have ArcGIS Online hosted ArcGIS REST services and ArcGIS Online hosted WFS services (made from the REST service item in ArcGIS Online):

The layers are shared to the public and to our ArcGIS Open Data group.
Howerver, its only the ArcGIS REST services that are shown in the Open Data page - there is no WFS.. Notice the Content Type overview to the left, where WFS aren't present:

Going to the hub administration page, the WFS services are there:

And i can see from a guide we made previously, that it has been on the Open Data site earlier (june 2020)
So, why are WFS services not shown on my Open Data site anymore?