OrangePi PC can enable USB OTG by following the steps below.
$ cat /etc/debian_version
12.1
$ uname -a
Linux orangepipc 6.1.47-current-sunxi #1 SMP Wed Aug 23 15:52:42 UTC 2023 armv7l GNU/Linux
$ sudo sh -c "echo 'g_serial' >> /etc/modules"
$ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
g_serial
$ sudo sh -c "echo 'ttyGS0' >> /etc/securetty"
$ cat /etc/securetty
ttyS0
ttyGS0
$ sudo systemctl enable serial-getty@ttyGS0.service
$ sudo shutdown -r now