I'm just curious as to why there isn't a Glitchless% run avalible, and if it could possibly be added.

If you look in the Misc. tab you'll see 'Bug Limit Categories', which are essentially equivalent to glitchless.

Cause bug limit is way more fun and entertaining than pure glitchless at least that's how I feel about it and also there's no real need for glitchless

Also it can be tricky to define what counts as a glitch because there are lots of unintended things that aren’t technically glitches