I have multiple powerplants across the map. Some are powered by gas and other by coal.
So I would like to have gas turbine prioritized running "1" and other coal powered turbine as "2", so it will join during demand peaks, and use more gas than coal
Already implemented.
If using separate shafts, see attached screenshot.
If using a common shaft, use a pipe balancer to prioritize steam from your gas burners over your coal burners.
depending on your setup you can do that.
either use priority on the generator (they have a separate option for that)
or with balancers where you prioritize the input of steam