the XGS1210 was merged here https://github.com/openwrt/openwrt/pull/19064
a thread about the B1 is here New Rev. (B1) of Zyxel XGS1250 udn XGS1210 - ports missing
the XGS1210 was merged here https://github.com/openwrt/openwrt/pull/19064
a thread about the B1 is here New Rev. (B1) of Zyxel XGS1250 udn XGS1210 - ports missing