You probably won't have WWAN on any laptop with FreeBSD. I had a secondhand HP EliteBook (personal) which had a WWAN card, until I replaced it with a HP Spectre without WWAN. The EliteBook's WWAN supported Windows, and had a Linux driver, but no FreeBSDBSD.
My work laptop (a ThinkPad X1 Yoga) may have WWAN but I'm not 100% sure (Windows shows a cellular data app). While I could install FreeBSD on the ThinkPad (I have admin and BIOS access) and the BSD support would be likely better (although my X1 Yoga is Coffee Lake, whereas my HP Spectre is Whiskey Lake).
But at work I use every Microsoft product imaginable (disclaimer: I work as a software engineer at Microsoft or a partner) plus BitLocker and mandatory certificates to use the Wi-Fi and intranet making a dual-boot here far from a slam dunk (in comparison, my Spectre dual-boots Windows and FreeBSD). Not to mention that I actually prefer HP hardware to Lenovo even if support is 'worse'. So I may never know if my ThinkPad's WWAN is supported or not, that is if it even exists.
