Even if one wanted, doubt you could get access to what the President types into his phone through a FOIA.
I think the big difference between 30 years ago and 30 years from now, is that in 30 years, almost every single public thing ever done by the President will be on video.
I got what my local mayor typed into his ChatGPT sessions via FOIA. He didn’t believe I could legally do that, a judge told him differently. Got like 52 pages of Chatlogs and had tremendous fun going through them.
But you’re probably right, what the president types is probably declared a national security issue or only available to be viewed by members of congress or senate. Still it has to be recorded and put into archive, so maybe we get a better view into what the people in charge of the country thought at this time in 30 or so years when it’s declassified.
If there is enough pressure by the American public to release that data earlier, there is a good chance it could happen tho. Think about the Epstein files.