Staking on exchange platforms

Is it permissable to do staking in exchange platforms if you act as a delegator providing the crypto coins you own. The platform would then hse your coins for the staking and give you x% reward.

Furthermore the exchange platform states
The APY interest is adjusted daily based on the on-chain staking rewards and the specific APY is subject to the page display on the day. The APY may be adjusted to account for funds we hold back from staking as part of our liquidity reserve, if applicable.

In this case would it be permissable to act as a delegator and have your coins carried out in staking in return for a reward and if not could someone explain please.

Jazak Allah khairan

@Mufti_Faraz_Adam if you could please elaborate shaykh if possible. Shukran