No TUN support - can't use OpenVPN on SenseCAP WM7628N

ChirpStack Gateway OS v4.8.3 ships without TUN device support in the kernel. This makes OpenVPN impossible to use.

Firmware: chirpstack-gateway-os-4.8.3-sensecap-m2-ramips-mt76x8-sensecap_wm7628n-squashfs-sysupgrade.bin
Hardware: SenseCAP WM7628N (MT7628AN)

Please, consider enabling CONFIG_TUN=y or CONFIG_TUN=m in kernel config for future builds.

Thank you