perhaps you're right, we should say it more visible.
In the welcome of the helps is listed:
Comments Plugin, integration with JComments
We thought, this would be enough.
on JEM 2.3.3 stable in latest Joomla (3.10.2) Protostar php7.4.15
Personally I use t4_B5 template with t4_system plugin framework with bootstrap 5 and fontawesome)
(I prefer free "Signal" or paid "Threema" instead of "Whatsapp".)