How can I unlock my iPhone XR from iCloud?

It seems you are referring to Activation Lock, per your comment of “what can i do to unlock owner icloud.” In that case, if this is your iPhone you rightfully purchased from Apple or an Apple Authorized Retailer, you should be able to enter your Apple Account login to remove it. If you purchased this iPhone from an unknown seller, you were likely scammed and you should try asking for a refund or else the iPhone is a brick.