Can I define a group of VELUX skylights or skylight shades to be controlled together?

Personal product grouping cannot be created in the app.
To control all products in a room of the same type, select the room screen and the group option below the sensor values. Changing the slider position now controls all products of that type. To obtain individual control, select the Device option.

Alternatively, control all skylights or skylight shades of one type from the indoor climate sensor in the room. These groups are always skylights or shades.