The number of block confirmations required to deposit in each chain varies. You can see the estimated number of block confirmations required to deposit and withdraw for different chains under a specific cryptocurrency at the bottom of the deposit page.
Once a transaction has been sent to the block and confirmed, it will appear in the transaction record, but the assets will not appear in the asset list until the estimated number of block confirmations required for the deposit has been reached. In this case, please be patient and wait for the block to reach the required number of confirmations.