Are there any single exit smw records? Such as Yoshi's Island 1 to the left of Yoshi's House beofre the yellow switch?

Closest thing I know are meme categories such as these:

https://www.speedrun.com/smwext#World_1

If you're asking for ILs, I think it's been discussed a number of times and it's not going to happen.

Don't even know what ILs are or is to be asking for it, haha. I'm relatively new to this community.

IL -> Individual Level

IW -> Individual World

There isn't a single exit category, no

People do practice individual levels on the practice cart, which also records your time for that level down to the frame. While there isn't a leaderboard or anything, you can definitely try and compete against the 'gold' or 'pink' times or the times of the strategy demonstrations shown on the wiki or your friends' times.