Hi, I like to use the energy dashboard to view my pv panels power production.
I made a api connection from Solis to home assistant and I can see all the entities in the developer tools. See picture.
That is a power sensor not an energy sensor. Two different things.
The energy dashboard uses energy sensors. Not power sensors.
If your solar integration does not provide an energy sensor you will have to create one by feeding your power sensor to the Riemann Sum integral sensor (integrating power with respect to time gives energy).