We used to have a 'Dynareport' which listed the SIDs/WIDs being worked on in a group.

Our Specifications manager has offered the following advice, to help you get the same (or close) from the 3GPP Portal:

https://portal.3gpp.org/#/

1. Select the WG (top left)
2. Select Work Plan (thumbnail)
3. Select Release(s)
4. Search