I’m not sure the pick rate of a Paladins character is going to compare quite the same to a Overwatch character.
Paladins characters have to be unlocked to play in competitive, according to the wiki players can play comp with as little as 14 characters unlocked and has upto 4 bans.
This means that a player who owns the minimum of 14 characters could go into comp, get 4 of those 14 banned. Then have 9 of the other characters picked forcing them to play the last character they have unlocked.
This means there are various scenarios where players are forced to pick between a very small roster of characters which can easily inflate the pick rate of a less than desirable character.
Pickrates for OW are reported as a ratio of 2:12 seems the pickrates are reported per team but I would assume the pickrates in Paladins would be 1:10 ratio and reported per game.