Because it is not a WhatsApp link or a direct URL, you should not use another link to hide your WhatsApp link or direct URL with an unreliable third-party shortener.
If the URL you want to post is lengthy, you may try shortening it directly on your end or using a reputable link shortener application.
We don't advise you to create a third-party URL for WhatsApp since criminals or scammers generally utilise these third parties to cover their tracks. These URLs might contain a payload that compromises your privacy or results in financial loss.