In the latest WhatsApp beta, version 2.19.97, WhatsApp is testing another feature for group admins to stop users sending frequently forwarded messages in groups. This feature is still in testing.
The feature will be available in Group Settings, and will be visible only to group admins. When it’s enabled, group members will not be able to send frequently forwarded messages in the group.
WABetaInfo reported that WhatsApp is testing this feature in the Android version of the app.