I can use this conveter on FreeBSD-15.1/arm64 Raspberry PI zero 2WH.
ugen0.5: <vendor 0x1a86 USB Single Serial> at usbus0umodem0 on uhub1umodem0: <vendor 0x1a86 USB Single Serial, class 2/0, rev 1.10/4.44, addr 5> on usbus0umodem0: data interface 1, has no CM over data, has no break
FYI:
Previously, I use Akizuki Denshi FX234X micro USB to Serial converter.
uftdi0 on uhub1uftdi0: <FTDI TTL232R-3V3, class 0/0, rev 2.00/6.00, addr 4> on usbus0