I wasn’t able to find that info from the WordPress dashboard.
I looked in FileZilla at the wp-content.php file and the DB_Charset field was empty/undefined. Does that mean it defaults to UTF-8? How do I change it to utf8mb4?
One further question: can the browser cookie be reset after every redirect to the profile page? This is because if two people subscribe on a shared computer/browser, it can override the form. Resetting the cookie would be a good way to ensure that clicking “manage subscription” in the newsletter footer fills the profile editor with the correct info based on whichever email address/client clicked it.