Earlier quoted context omitted.
A significant source of electricty is generated from waste-to-power plants in the Nordics. Several of those countries import rubbish by the shipload to turn into power. For that matter, it's probably a net positive to put most plastic "recycling" into such schemes, as we're just turning plastic products into lower and lower grade pieces, with the associated generation of microplastics.
Combustion with energy recovery is slightly lower down the "Waste hierarchy" than recycling. Nordics get even more bonus points if they use the waste heat for district heating after generating electricity but I think it still comes out as a bit worse than recycling overall. There's complicated interactions though, removing the plastics can affect the makeup of the fuel and the post combustion products can free recycl…
Waste -> district heating is definitely happening in Sweden. Probably more so than waste -> electricity. There are better ways to generate electricity and we need heating anyway big part of the season.