I'm talking about things like Jump Buffering where the player can still jump after leaving the ground, And some common things like Moving platforms and jumping pads.

You might perhaps find some answers in the following TV Tropes page on the subject:

https://tvtropes.org/pmwiki/pmwiki.php/Main/PlatformGame​

Or in the following Wikipedia page:

https://en.wikipedia.org/wiki/Platform_game​