The LG IFTTT does in fact work, at least for me in the US with a washer and dryer.
So we link IFTTT to an ST virtual motion sensor/switch custom DH, which triggers when the washer/dryer is done, and then that links to Alexa to say “The washer is complete”. Which really is all we need for integration. The “native” LG integration with Alexa allows you to ask for washer/dryer status, but doesn’t allow for the push notification, we needed IFTTT for that.