How to integrate Mailchimp as my newsletter app?

[popsie]

Under "Integrations" when customizing my website, Mailchimp does not pop up as an option for "Newsletter App". 

We have been using Klaviyo as our embedded newsletter subscription form, but are trying to only use one application for our newsletters (we chose Mailchimp). 

I want the newsletter subscription to be embedded so I can have product pop-ups instead of newsletter sign-up pop-ups. 

[PaulMartin]

I don't know if this is what you are looking for but Mailchimp has a guide to embed a form to your page (not as a pop-up)
Add an Embedded Signup Form to Your Website | Mailchimp