> it can be composted in municipal facilities according to the bag

Note that "according to the bag" is very different from "according to your municipality"; my understanding is that most places actually can't handle them, and they might need to divert your compost to the landfill if it has too much of those plastic bags. They can be composed under certain conditions, but whether the facility your municipality uses has those is unclear.

See also "flushable" wipes that must not be flushed down the toilet.