LWCとApexでカスタム住所項目における住所検索の弱点を補強

<template>
    <lightning-card>
        <lightning-input-address
            show-address-lookup="true"
            address-lookup-placeholder="Google住所検索"
            address-label="カスタム住所"
            country-label="カスタム住所(国/テリトリー)"
            postal-code-label="カスタム住所(郵便番号)"
            province-label="カスタム住所(都道府県)"
            city-label="カスタム住所(市区町村)"
            street-label="カスタム住所(町名・番地)"
        ></lightning-input-address>
        <button onclick={sendAddress}>登録</button>
    </lightning-card>
</template>

import { LightningElement } from 'lwc';
import CustomAddressFieldsComponent from '@Salesforce/apex/EntryCustomAddressFieldsController.entryCustomAddressFieldsController';

export default class InputAddressBase extends LightningElement {
    sendAddress(){
        const address = this.template.querySelector('lightning-input-address');
        const country = address.country;
        const postalCode = address.postalCode;
        const province = address.province;
        const city = address.city;
        const street = address.street;
        CustomAddressFieldsComponent({PostCode: postalCode, Country: country,State: province,City: city,Street: street})
    }
}

public with sharing class EntryCustomAddressFieldsController {
    @AuraEnabled
    public static void entryCustomAddressFieldsController(String postCode,String country,String state,String city,String street){
          CustomObject__c co = new CustomObject__c();

           //①州/国/テリトリー選択リストの州名、国/テリトリー名と州コード、国/テリトリーコードを取得
           DescribeFieldResult countryCode = Schema.CustomObject__c.CustomAddressField__CountryCode__s.getDescribe();
           List<Schema.PicklistEntry> countryCodePle = countryCode.getPicklistValues();

           DescribeFieldResult stateCode = Schema.CustomObject__c.CustomAddressField__StateCode__s.getDescribe();
           List<Schema.PicklistEntry> stateCodePle = stateCode.getPicklistValues();

           //検索画面の入力値と州名、国/テリトリー名と州コードを突合し、対応する州コード、国/テリトリーコードを特定
           Map<String, String> countryCodeMap = new Map<String, String>();
           Map<String, String> stateCodeMap = new Map<String, String>();

           for( Schema.PicklistEntry f : countryCodePle){
                countryCodeMap.put(f.getLabel() , f.getValue());
           }

           for( Schema.PicklistEntry f : stateCodePle){
                stateCodeMap.put(f.getLabel() , f.getValue());
           }

            //③カスタム住所項目を構成する各項目に入力値を代入し、都道府県と国は州コード、国/テリトリーコードを代入
            co.CustomAddressField__PostalCode__s = postCode; //郵便番号
            co.CustomAddressField__CountryCode__s= countryCodeMap.get(country); //国/テリトリーコード
            co.CustomAddressField__StateCode__s= stateCodeMap.get(state); //州コード
            co.CustomAddressField__City__s = city; //市区郡
            co.CustomAddressField__Street__s= street; //町名・番地

            //④レコードを新規作成
            insert co;
    }
}