Since 2018, Chrome has marked HTTP websites as not secure, without exceptions! This is a big deal, as it can greatly affect users’ trust in your business. HTTPS has also become an official ranking factor in search engine results pages.
These reasons should be enough to convince you to check HTTPS vs HHTP and make a gradual shift. https://advdms.com/blog/https-vs-http-a-guide-to-securing-a-website