Is PUN with Master Client system good for 20 players battle-royal style game?

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I'm making the battle-royal game that have 20 players on the same map.
and there will be the collectable item, NPC, traps on the map. (and may be another interactable object)

It will be on the mobile platform (both Android & iOS). if I use the Master Client, Is 1 client device sufficient to handle data for the rest 19 players? or It should be a dedicated server?