FreeBSD supports wireless adapters in access point (infrastructure) mode, but this functionality is limited to some drivers and there may be some, which do not support all options available via the web interface. Please make sure that you buy a wireless card that is supported to avoid these problems.
I use an ARM device with wifi stick in access point mode running linux (bridged with eth0). I have one opnsense with wifi as WAN, but that's a different piece of cake.wifi as an access point on opnsense directly: I don't think you will find a single thread on this forum supporting this setup, not to speak of wifi 6 https://wiki.freebsd.org/devhttps://www.freebsd.org/releases/14.0R/hardware/https://docs.netgate.com/pfsense/en/latest/wireless/hardware.html