You've cited policy which blocks prosecution of sitting Presidents -- but that didn't necessarily enjoin eventual justice from being served after his term(s) end. However the outcome of Trump v. United States, 603 U.S. 593 (2024) appears to not just block prosecution but grant immunity, meaning what would normally be a crime ceases to even be a crime.
That ruling appears to draw a nearly complete shield of immunity around Presidents for any crimes done as 'official acts,' and nearly everything can be claimed to be an 'official act' especially given how vaguely-scoped much Presidential power has become. I consider it pretty unlikely that we'll ever see a former President even be charged with a crime if Congress doesn't explicitly repudiate this ruling with an actual law.
Source: https://en.wikipedia.org/wiki/Trump_v._United_States#:~:text...