Can you add a Mailchimp Tag to the Form entry

We love the Mailchimp Top Bar and we are using it on the bottom of our site. BUT, we are wanting to add a Tag called “Website Popup Signup” to the form entry in Mailchimp. We are doing this in our Elementor Footer form that links to Mailchimp and tags that entry as “Website Footer Signup”. This way we know what form on the website the entry originated from.

Can this be done in this plugin?
If so, how?
If not, can it be added? This would be a very useful tool to let users like myself figure out what works best for our signup forms.

The page I need help with: [log in to see the link]