I bought two sets of these lights (6 in total) for one room. I am able to control all of them with one switch. The Hue app works well in order to change colors and/or intensity

You can connect them electrically in series as normal. Nothing to do with the connection to the app.

Hi, each individual light can be set individually or switched together as a scene.
You can then set everything as you like via the Hue app.