Ionic 5/Cordova/Angular: Outlook app not opening when using Email Composer

I am using the Email Composer Cordova plugin and when a button (using the sendEmail() function) is clicked it will open the Mail app and will populate a draft email with html text content.
I have a user that only has the Outlook app with a configured email account on their iPhone 8 (ios 13.7) where clicking on said button does nothing.

My question is:
Does the Mail app have to be active and one configured email account enabled for the Email Composer plugin to work?
Or should any email client/app (e.g. Outlook, Gmail) be able to be used?