NXdomain what is it? I'm being bombarded by it

have no idea what NXdomain is. After being hit by it several times, I decided to look it up, apparently it's something to do with ISP's trying to highjack DNS request. I've noticed this since I've been using nextDNS off and on, however today I was hit multiple times, back to back with it. I use a VPN in conjunction with nextDNS services. Earlier in the day I noticed: content-autofill.googleapis.com was coming to/through my Android device, even though I never have and never will use Google autofill for anything. So I blocked it. And if you look at the log, it shows Google being first and last of the NXdomain bombardment. Any coincidence? What do you think? Should I just block NXdomain altogether?

Here is a link to the same screenshot:

https://drive.proton.me/urls/1HXDCJGFQC#WgAWjAokTfaw