Upgrading for the M2 Pro chip also updates the amount of ports you obtain. The M2 Professional version of your Mac mini has two far more USB-C Thunderbolt four ports than the regular Variation, for a complete of four, https://macktechbiz.com/blogs/news/unleashing-the-power-of-micro-appliance-pc-firewalls-a-revolution-in-open-source-firewall-solutions-with-zenarmor-and-opnsense-support