The cyber attack was real and the effects of it lasted longer than 3 weeks.
I always have my bonus points posted to Bonvoy and it usually takes a few months to post. For me, this has been a perennial issue, but the points always show up eventually. Several years ago, I was frustrated that the points hadn’t posted in a few months and after some back and forth with Sixt and Marriott, found out that the issue was with Marriott. For whatever reason, their system is very slow to post points after notification from Sixt and I have to contact Marriott to get a resolution. I’ve given up worrying about the car rental points posting because in the long run a thousand points or so per rental isn’t going to make a huge difference in my travels. Life is too short.