If you never used android i don't think there's a way to load the game on a new phone. Google keeps track of the games installed on an account and will let you reload previously loaded games even if not listed in play store anymore.
If you know someone who has DS on their android phone....you may be able to do a wi fi copy...but i am jot sure about that, i vaguely recall hubby doing that with yis tablet but how he did it is beyond me but someone else may be able to say yea or nay on this possibility.
I use android and have a pixel 6 android 13 with 8 gig ram and my big isle, level 200 with mostly 5 drgn habitats will not load on that. It takes only 30 secs or so for it to kick me out...seems it doesn't load much at all before it fails. Very discouraging.