I guess, in hindsight, it's a good thing Ericsson didn't win. It would've been a major controversy to have the win negated and moved to last place
I hate these post-race DQs, but rules are rules I suppose ...
https://www.motorsport.com/indycar/news/andretti-global-prema-racing-issued-suspension-and-100k-fine-in-post-indy-500-tech-violation/10727056/
Also, seems a bit strange that the cars passed tech for qualifying but were, apparently, modified before the race??