I can't tell you why a .22LR is $0.07 vs $0.06.
But I can mention that primers are used on bullets for sale. There has been a large push for NATO, government, police, rounds to be completed during and after the pandemic. Also there has be 4 million more new gun owners that require bullets to shoot. Most primer manufactures seem to sell their primers to the major bullet manufacturers to be used in completed rounds rather than sell them to reloaders. Since the supply of primers is down, the price goes up.