WooCommerce checkout field adjustments. Removes company, country, address, city, state and postcode. I have commented out the removing of phone and e-mail. I have also removed the additional information box.

woocommerce-snippet.php

/* -------- WooCommerce - checkout fields ----------  */ 
 
/* From Kathy.  */
function kia_modify_default_address_fields( $fields ){
    if( isset( $fields['company'] ) ) unset( $fields['company'] );
    if( isset( $fields['country'] ) ) unset( $fields['country'] );
    if( isset( $fields['address_1'] ) ) unset( $fields['address_1'] );
    if( isset( $fields['address_2'] ) ) unset( $fields['address_2'] );
    if( isset( $fields['city'] ) ) unset( $fields['city'] );
    if( isset( $fields['state'] ) ) unset( $fields['state'] );
    if( isset( $fields['postcode'] ) ) unset( $fields['postcode'] );
    return $fields; 
}
add_filter( 'woocommerce_default_address_fields', 'kia_modify_default_address_fields' );

function kia_remove_billing_phone_fields( $fields ){
    // if( isset( $fields['billing_phone'] ) ) unset( $fields['billing_phone'] );
    // if( isset( $fields['billing_email'] ) ) $fields['billing_email']['class'] = array( 'form-row-wide' );
    return $fields;

}
add_filter( 'woocommerce_billing_fields', 'kia_remove_billing_phone_fields' );


// https://businessbloomer.com/woocommerce-remove-order-notes-checkout-page/
// Removes the Additional Information box.
add_filter( 'woocommerce_enable_order_notes_field', '__return_false' );

Add the above into the child theme functions.php or an external woocommerce code snippet file.