I saw a video on Reddit where the user did a runthrough where he did nothing but Loot from villages, sunken ships, etc and then went on to beat the ender dragon.

I thought this would be an interesting category to run on Java Edition known as Looting%.

Any suggestions or ideas as to where i can submit this for possible certification?

I'd say no because it's a challenge run which basically makes it so you have to go slower and I personally see absolutely no point in that