Trump has the power to declassify and he should at least have the same info as Jordan, Nunes etc. This needs to be released, but I’m sure that Congress’ info is incompete with gaps.
Unfortunately Trump probably can’t get the overtly incriminating info (treason with Russia/China, coup plot) because of the moles blocking him at DOJ, FBI, CIA, NSA. If there are phone calls, there are probably recordings and not all calls were probably done in a secure facility.
Our intelligence agencies are operating against the President. It has been this way since the coup’s where they removed JFK, and Nixon.