You can still kick them out with another amiibo and over time I am sure they will have that thought bubble and ask to move. I remember in NL that it was more rare for a scanned amiibo to ask to move until you filled your entire town in almost all amiibos. So it could be possible that carried over to this game because the few I scanned in haven't asked that I am aware of.
I've used amiibo and kicked out two Sanrio villagers already after getting their photos, they're definitely not stuck anywhere, they're behaving like any other villagers, other than not being able to be invited by other players when they're moving.
I've used amiibo and kicked out two Sanrio villagers already after getting their photos, they're definitely not stuck anywhere, they're behaving like any other villagers, other than not being able to be invited by other players when they're moving.