Do you get star fragments on your beach if you wish upon a star at someone else's island?
I can confirm if you wish in someone else's island, you do get star fragments the next day on the beach.
My boyfriend and I also tested how many star fragments you can get the next day. We wished during a meteor shower 200 times for the achievement.
The next day of the meteor shower, I didn't get hundreds of fragments (although I didn't expect to) on my beach, but I did get up to 40 star fragments total on my beach throughout the day:
* 32 star fragments
* 3 large star fragment
* 5 Aries fragments
Although I did continue to pick up star fragments throughout the day as time passed in my town, they take time - it was over the course of a couple of hours for me, although I was also working on my island to help pass the time.
It seems to me that there is a
limit of 40 types of star fragments in a single day, since that's how many I got when they stopped spawning even though I had over 200 wishes. I also want to note that when my boyfriend restarted his game, the star fragments
stopped spawning for him entirely, so he didn't get to collect the full 40 types of fragments that I got to.