The current source of data is from player.force, specifically:
force.item_production_statistics
force.fluid_production_statistics
https://lua-api.factorio.com/latest/LuaForce.html
Anything off force would be pretty easy to add, but I don't see anything related to power at the force level.
Looks like electricity stats only live on power poles:
https://lua-api.factorio.com/latest/LuaEntity.html#LuaEntity.electric_network_statistics
A mod could probably have the player select a placed power pole and track the network that pole is connected to, but probably not something this mod will attempt.