FlexiPage should be used in the package.xml to retrieve and deploy Salesforce Lightning Record Page.

Salesforce Lightning Record Page:

Sample package.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types>
        <members>Sales_App_Account_Record_Page</members>
        <name>FlexiPage</name>
    </types>
    <version>57.0</version>
</Package>