Proof of stake coins are the ones that will allow you to earn passively. So, it's like an interest that you'll earn which is called APY that you'll earn a percentage annually.
Exchanges do offer this but there's the risk on it because you are not the one who's holding the key.
Sure, if you wanna call a coin decreasing in value by half every year but giving you 17% APY
”passive income” then go ahead and call it that way, but I’m quite sure that under 10% of the staking tokens overperform their own inflation lol.