Will I be able to transfer miis that I create onto my island ?

So basically I have a switch 2 as my current main console, but I still have my old switch oled that I use as extra storage (which ig is irrelevant now because of the game cards but besides the point) and I made my first 3 miis on my switch2 but then I did the demo again on my oled with new miis and even though the game isnt out I was wondering if you guys think Ill be able to transfer my miis to my other console. I think it should be fine because it will be local and its 2 systems but I dont know if them being the same Nintendo account will make a difference.