If he started any investigations they would be shut down the day he left office. Once you declassify and release documents they are around the world in minutes. You can’t put the genie back in the bottle.
Big tech will make sure that info marginalized and treated as a fairytale. People can’t even post about voter fraud on Twitter without their accounts being deleted.
And If you think places like Google won’t ban the material from file sharing sites and search engines you’re living in a real fairytale.