I’ve found some good resources on the internet.
Port 80 (HTTP) vs. Port 443 (HTTPS) - https://cheapsslweb.com/blog/port-80-http-vs-port-443-https-major-difference-to-know/
What is the use of port 8443? - https://stackoverflow.com/questions/61760786/what-is-the-use-of-port-8443