Nope

other than using amiibo, you pretty much have to wait it out, sadly. There’s really no evidence that speaking to him will make a difference at all, and neither will ignoring him, mistreating him, etc. Honestly, I’d just treat him as a normal villager and wait for him to eventually ping. When he does ask to move out, after the initial ping, don’t talk to him at all or he might change his mind.