I recently started doing some shoutcasters on stream for an org that is starting a duo tpp league for pubg on Xbox if anyone is interested I will leave the link here. They have a very good rule set, scoring system, and PUBG API integrated leaderboard system thats the best I've seen for console yet! Also, they have a K/D requirement to try and make it more competitive 🙂
Https://www.Gloryordeath.co.uk/rules/league
Https://www.Gloryordeath.co.uk/signup/league