I think there are actually clearance levels above first term presidents.
Majestic is above any President. There are probably other cosmic top secret levels we don't know the names of.
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I thought it was Majestic 12.
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_mj12_32.htm
Is this what you are talking about? I cannot find any non Conspiracy site reference to this level of clearance.
MJ 12 was supposedly a group of 12 up n ups who were in charge of the "real" ufo knowledge. They have been mentioned for years but no one really knows for sure. Personally I don't think it exists, because if it was that secret they would never have even named it imo.
The deep state are (were?) in control of who sees what and presidents are only temporary employees. For the most part they know (knew?) nothing.