I'm really not one to defend KnY but.. I mean even if technically it didn't break the record you mention (I assume DB is the record holder?) Dragon Ball got those crazy numbers back in 1993 Issue 12 of WSJ with a circulation of 6,380,000 against 2020's which I assume is around 1'600,000
(Basing myself on the info on wikipedia) which is almost 400% less issues of Jump..
That also means the turnout was way higher, almost 10% of the people that bought that issue of Jump voted in the KnY poll while "only" around 3.15% voted for Dragon Ball.
So.. basically accounting for "inflation" those 130,316 votes would have been around 520,000 votes if Jump had the same circulation using the rule of 3.. But of course that's not really how things work, but yeah.
Also as a bystander I had always assumed the MC's sister would have polled top 5 or something but it seems like she didn't..? Like please don't spoil but I had assumed she was fairly popular.. I mean it's weird because I have been thinking reasons why KnY got so damn popular
(As in things that made it stood out from any other generic battle shonen manga) and one of the only reasons I could think of was the siblings relationship which isn't that common (Most manga have love interests so in a sense a brother & sister relationship is kinda refreshing,, when you think about it other series that blew up like FMA and Blue Exorcist had a sibling relationship albeit with both siblings being brothers)..
So yeah just a weird thought I had, I thought that girl with the muzzle would have been more popular... I guess I will never find a pattern for the popularity of KnY lol.