Possible, not probable. It’s a cool idea but even if the island is theoretically possible and there’s some real astrophysical process that could actually synthetize such nuclei, they’d likely still be only "stable" relative to other superheavy elements. That is, half-lifes from seconds to years or something like that rather than microseconds.
Ok, looked back at some stuff I read, and yes we are talking about half-lives of a couple of years at most. Disappointing, but thank you :)
In later years, I thought it had changed to "relatively stable"... as in elements that have half-lives in minutes rather than in milliseconds.