I personally might not use a headphone jack or SD card slot very much, but for the market that a GrapheneOS phone would be targeting they seem like OBVIOUS things to include.
The crowd getting excited about this partnership is pretty much the same crowd that complains about features like those going away.
Honestly I think it's a tried and true shameless asshole business strategy of his or something. You tell everybody you made a deal and brow beat the other party into just going along with it instead of trying to correct history.
It might not work for many people and businesses, but it probably works for a narcissistic trust fund scumbag that was handed a real estate empire and taught strategy by the very man who raised Donald Trump to have the personality he does.