It’s been a couple of years but I see we’re still struggling with this: Synchronize the on/off state of 2 entities - #81 by dbrand666.
This still seems to work but it hasn’t caught on: Select multiple entities to link their on/off state. If any selected entity is turned on or off, the other selected entities will be sent a matching on or off command. · GitHub.
Use my gist or just change the mode on your favorite variant to “restart” instead of “queued”.