Pre-ESXi 8.0 Update 1, if you needed to modify the default ESXi HTTP(s) Reverse Proxy Ports, you would simply edit the HTTP reverse proxy configuration file, which I have previously blogged about HERE (pre-ESXi 8.0) and HERE (ESXi 8.0).
For ESXi 8.0 Update 1, the process is slightly diffrent as all ESXi configurations including configuration files have been completely migrated to the new ESXi Configuration Store, which was initially introduced back in vSphere 7.0 Update 1, which you can learn more about it HERE and HERE.
While most users stick with the system defaults with port 80 (HTTP) and port 443 (HTTPS), I know there are some organizations that require these ports to be changed to meet certain internal compliance requirements. Below are the updated instructions for modifying the ESXi HTTP(s) Reverse Proxy Ports when using ESXi 8.0 Update 1 or later.
Disclaimer: VMware does not officially support modifying the default HTTP/HTTPS ports on an ESXi host.