Hi,
I'm not sure if this is related, but I noticed today after upgrading both ArcGIS Pro to 3.0.3 and also data interop that I also cannot read from an AGOL table using the Reader or Feature Reader. The readers work fine for the polgyon and point layers, but not the tables. I can still connect in and read features in Pro 2.9 and data interop.
This seems like a bug to me. I'm authenticated to AGOL if I can read the in the other shape feature but I have 2 related tables that are now are getting the error 'ArcGIS Online Feature Service Reader" Could not find a layer/table matching feature type 'table'
The same readers find data from SQL Server tables no problem.
Maybe this is what you are also experiencing John.
Thanks,
Kathy