Create Custom script from bitcoind I'm able to create multisig with bitcoin-cli with addmultisigaddress

bitcoin-cli addmultisigaddress 2 '["'$ADDR_MITT_1'","'$ADDR_MITT_2'","'$ADDR_MITT_3'"]'


But How can I add extra OP like CLTV or another OP? Can I use bitcoin-cli to generate redeemscript and address?
You cannot. Bitcoin Core cannot reason about arbitrary scripts and does not have the capability to sign for them. As such, it cannot create arbitrary scripts and store them.

You can create the script yourself and import it into a wallet using importmulti. This will only add the script to the wallet to be tracked. This will only let your wallet see transactions and compute a balance. Again, Bitcoin Core cannot sign for arbitrary scripts, it does not know how to. So importing a script does not mean that the wallet will be able to sign transactions that use that script. It is purely for transaction tracking.