"If the unsupported widget has an iFrame version, make it into an <iframe>. If you do that, the IV page will not be generated due to unsupported content, but things will work out of the box if and when we support that widget. [...] ๐๐ญ๐ก๐๐ซ๐ฐ๐ข๐ฌ๐, mark the object with the @unsupported function."
So, you should left <iframe> version of widget which used in original page (https://i.vgy.me/Mlsk2L.png) instead of using @unsupported function
Log in here to create Instant View templates. Please enter your phone number in the international format and we will send a confirmation message to your account via Telegram.
[...]
๐๐ญ๐ก๐๐ซ๐ฐ๐ข๐ฌ๐, mark the object with the @unsupported function."
So, you should left <iframe> version of widget which used in original page (https://i.vgy.me/Mlsk2L.png) instead of using @unsupported function