The manual sending method is the most reliable approach. Other methods tend to cause frequent errors and are not recommended. In particular, KakaoTalk provides clear documentation on how to implement its sharing feature. Please refer to the link below for details:
KakaoTalk Share JavaScript
https://developers.kakao.com/docs/latest/en/kakaotalk-share/js-link
After implementing the JavaScript integration, it’s a good idea to test it with the KakaoTalk PC version. While it usually works fine on mobile, notification issues can sometimes occur on the PC version. You can download KakaoTalk for PC from the following link: