Is it possible to embed iframe in the HubSpot layout?

Hi @Willson , I read documentation for CRM Extension. I can see that it is expecting a data fetch URI, where it is expecting a response from and that response will be shown on the cards for a particular record. Further, if we provide any action ( like iframe ) then it will be open up in a new window.

I am looking for a type of integration where it won’t expect a data fetch URI and give a link on CRM card where I can display my iframe and perform any functionality using CRM APIs.

Is it possible ?

Further, is there any other process using which I can make changes in hubSpot layout ?