:~$ lsmod
Module Size Used by
option 57344 0
usb_wwan 24576 1 option
usbserial 65536 2 option,usb_wwan
wireguard 147456 0
zram 36864 2
sprdwl_ng 438272 0
sprdbt_tty 40960 2
uwe5622_bsp_sdio 294912 2 sprdbt_tty,sprdwl_ng
Looks like wireguard is available.
Anyway maybe I can use iptables with this build.