I don’t doubt there was a some type of shift...there are many undecideds and indies out there and I believe Trump’s stamina with two weeks solid of rallies may have been the nudge they needed...that and Biden’s gaffes and Hunter’s laptop info (though not covered by MSM, still cast a pall over the candidate)
I also watched Trump over the last few weeks of the campaign. He made an oh-so-subtle shift, becoming more Presidential and less bombastic. That likely won over some of those wavering suburban women for him.