Additional Array methods were added in https://docs.vrchat.com/v2021.4.1/docs/vrchat-202114#changes-improvements-and-fixes-1 with the accompanying canny post marked as complete https://feedback.vrchat.com/vrchat-udon-closed-alpha-feedback/p/add-more-array-methods-to-all-array-types but Array.Sort was mysteriously left out.
This would be EXTREMELY useful for quickly making a deterministic list of players using GetPlayers()'s VRCPlayerApi array by playerId (and then sorting the VRCPlayerApis by playerID with Array.Sort(keys, items)). Currently in Udon that array is out of order for different clients, and individual playerIds represent their join order, rather than an autofilled sequence from players leaving and joining.
It would also be useful for sorting VRCPlayerApis by a world's game score for a scoreboard. Array.Sort is extremely useful because, even though we don't have access to custom data structures or IComparable implementations in Udon, we can still sort things using associated arrays of intrinsic data types.
And before you do the same thing that you did with the previous post, please just whitelist everything you can. Not just Array methods. Stringbuilders. Native Unity components like LODGroups. Although a rumor, I heard that ReflectionProbe endpoints weren't included for a YEAR after Udon's release because there was a blacklist for anything with 'reflection' in the name. Please consider going back through the whitelist and enabled anything and everything possible.