As a Former PE player, this feature would be important to me, I’ve played PE for close to 8-9 years now but after only playing windows 10 for a week, i felt like I could beat PE me easily. The Controls are just entirely different and especially with all the sweats playing these days it’s hard to have a nice time playing PE. To remove this struggle for our fellow mobile gamers I’d suggest a setting that you can toggle in games separately, which allows you to only queue with other PE players to level the playing field a bit and making playing competitively fun and fair again 
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There already exists device based matchmaking, and you get queued into mobile players lobby only, unless the server has less than 300 players, then you get queued into mix game i.e. with pc and controller players.
Platform Based Matchmaking (playhive.com)
Here’s the support page if you want more information
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