Institutions merely owning a newly-IPO'd stock means nothing. They get access to shares at a reasonable price before opening while retail is buying at insane prices after open. See Figma as an example where institutional investors got it at $33/share and it ended the IPO day at $115/share with retail buying all the way up (including pops above that at like $127)
I thought it was common knowledge that IPOs are a way for insiders and early investors (not IPO flippers) to get a nice exit during the frenzy.