I'm asking because I moved to Australia almost 5 years ago and mine has not changed.
I know it hasn't because I went home before all the Coronavirus thing and everyone commented "Oh you haven't lost your accent!"
As an adult, I can't see how one WOULD lose ones accent!
Children sure...but my older child has not lost hers...she was 11 when we arrived. My younger now sounds Aussie because she was only 7 when we came.
I was listening to an interview with the woman who plays Serena Joy in The Handmaid's Tale and she sounds distinctly American but she can't have been in the USA THAT long? Lots of actors seem to pick up an American accent easily.
What about you?