The "Great Resignation" (a clever bit of branding; people were moving to better jobs, not resigning) coincided with that easy money drying up. Businesses had to actually start making money again, as did workers (many of whom re-skilled during the pandemic). Higher-than-normal employment migration might have just been people coming out of unemployment, gig work, and whatever jobs they took just to ride out the crisis.
Also, high inflation coincided with the increased numbers at many companies. The layoffs came after inflation started to cool (probably an important contributor to stagnating wage growth), and probably were related to the Fed continuing to raise interest rates and putting off a pivot to dropping them until... Well, they still haven't done a cut, yet.