Apple Macbook Air (M1) lost bwfm

This is 7.6-beta/arm64 (#179) on an MBA (M1, 2020),
the last kernel used is this:

https://github.com/janstary/dmesg/blob/master/apple-macbook-air-A2337.20240915

While this listing shows
bwfm0 at pci1 dev 0 function 0 "Broadcom BCM4378" rev 0x03: msi
and it worked (I pkg_add-u'd the packages after the upgrade),
now I don't even have bwfm - with this same kernel, or with
an older /obsd (#31 of May's 7.5).

I blame the macOS upgrade to 15.0 (24A335) but I can't be sure.
Is it possible the macOS upgrade did something to the firmware?
OpenBSD has bwfm-firmware-20200316.1.3p3 installed.

Is anyone seeing the same?

Also, I have lost hw.sensors.aplsmc,
not sure how that would happen ...

I'll try another upgrade once I get a USB-C stick I can use.

Thanks for any clue.

Jan