the Linksys x6200 Support by OpenWrt ?
For checking the support status of any device, please see the Table of Hardware
No, X6200 is not supported.
Based on the X6200 hardware specs, I doubt that it will ever get support.
and i think this same
TP-LINK AC1200
TP-LINK VR600
TP-LINK VR400
TP-LINK N300
D-Link DSL-2888A