Sharing URL from website to FB messenger using fb-messenger share url link not working in iphone

I want to share website URL from my website to fb messenger. For that, I am using fb-messenger://share/?link=PageUrl syntax in href. It's working fine when shared from android but not sharing URL when shared from IOS. Is there any specific syntax for ios or am I missing something. As shown in image whenever I share url from website to messenger it opens messenger app and after sending it gives error.

It gives FBApiErrorDomain error 501.

<a class="btn-social" href="fb-messenger://share/?link=pageurl&app_id=******" target="_blank"><i class="fab fa-facebook-messenger"></i></a>