Staking in app how many nominators per validator

How do you find out how many nominators a validator has in the app, I believe 63 is the maximum

My take on it is to look at oversubscribed validators on ‘staking overview’ page… you can see how many are in the rewarded set - shown in parenthesis beside the amount of DOT staked - and the rest are shown below in red lettering. Currently 256.