You can run 'opkg update' and 'opkg list | grep tailscale' to see which tailscale version is available via opkg. Currently, the latest version is not available on the OpenWrt, and thus, on our devices. So I suggest waiting until the newer version will become available. However, there should not be any issues with using the available version. The connection should work fine when communicating with other tailscale clients that use a newer version. More information about the tailscale package can be found on the OpenWrt web page here.