Binance ETH 2.0 staking users are paid daily, and the reward yield is calculated according to your BETH holdings in Spot Wallet. Additionally, there is a queue for the activation of validators which also requires the gas fee to be paid.
The ETH 2.0 staking APR is dynamically changing, following the on-chain mainnet staking rewards. The more ETH is staked in total, the lower the APR will be. Also, the changes of the on-chain transaction volume affects the Ethereum staking rewards.