It will be interesting to see. And even more interesting to see what happens when they run again in a few months, given that this was more or less a RCV practice vote. Probably fewer bullet voters next time, which may work in Begich's favor.
I understand that Alaskan culture places a high value on respectfulness, and that's why some otherwise Republican-leaning voters may have chosen Peltota second to Begich, since Palin ran a very negative campaign.
It's interesting to see Palin claim that Republicans lost because the vote was split. https://www.cbsnews.com/news/sarah-palin-alaska-congressional-race-nick-begich-mary-peltola/ If she's right, this may be less the fault of RCV than it is the fault of the fact that people bullet vote.