Removal and creation of Sonos Groups

I have 3 rooms grouped together in Sonos, but at night I would ungroup them at a particular time so that Alexa announcements only come through on one room. Then regroup them in the morning.

(I could leave 2 rooms in a group ‘permanently’, and just remove the room I want the announcements)

Is that ungroup/group possible via webcore ?

EDIT: thinking about it, I could alway set the volume of the 2 rooms to zero (mute) overnight.

Which Sonos integration are you using? Built-in, or the advanced one from @daniel.winks? You can definitely do this with the latter.

Haven't heard of the advanced version. Will take a look.