The Supreme Court's widely derided ruling last week on presidential immunity opens up an extreme possibility — imagine a kiosk in the lobby of the White House where the president's "lap dogs" order get-out-of-jail free cards rather than fries and a soda.That's the country's new reality, according ...
Reading Justice Barrett’s partial concurrence, which is what the footnote responds to and also included in the linked ruling addresses your concern. Justice Barrett is unambiguously talking about prosecuting the president for accepting a bribe.
Except a pardon is a core function within the president’s constitutional authority, not just an official act, thus based on the opinion entitled to absolute immunity. The footnote exchange is only referencing official acts (which are entitled to presumptive immunity) not core constitutional functions (like a pardon).
Accepting a bribe is, however not an official act. It’s the acceptance of the bribe that’s illegal, not the official act itself.