on an arm64 box, many functions are not listed in dtrace -l. For example, on my A64-LTS board, the awg_probe and many other functions are not listed:
# dtrace -l | grep awg_
3543 fbt kernel awg_init_locked entry
3544 fbt kernel awg_init_locked return
3545 fbt kernel awg_media_status entry
3546 fbt kernel awg_miibus_statchg entry
I'd expect awg_probe and many others to be present.