Might be dumm questions, but you know what they say: there is no such questions.
When I add entity of vacumm and click on it, I got detailed info about roomba such as
However I would like to put that on page, instead of being shown when you click.
Any idea how to do that?
You can also make template-sensors and use them to get the attributes of your Roomba in its own entity (Battery for example). You can than put this on the same card as your Roomba.
Its also possible to call services from Lovelace so you can use that to start and stop the cleaning within a card.
I edited my own setup a bit as an example for you (note that I did not use any template sensors within the lovelace-interface. But I did call the services from within it):
It’s ridiculous that the nice interface that shows the status, battery percentage, and nice icons for every command is only available as a pop-up. And all it shows in Lovelace is a plain switch. There should be a way to use the pop-up as the card itself.