Merge "Account Details", "Payment Methods", and "Addresses" dashboard pages.

functions.php

// @link https://businessbloomer.com/woocommerce-merge-account-tabs/
// Credit: Rodolfo Melogli
add_filter( 'woocommerce_account_menu_items', function( $items ) {
    unset($items['edit-address']);
    unset($items['payment-methods']);
    return $items;
}, 999 );

add_action( 'woocommerce_account_edit-account_endpoint', 'woocommerce_account_payment_methods' );
add_action( 'woocommerce_account_edit-account_endpoint', 'woocommerce_account_edit_address' );