Hmm, I’m not sure there’s a way to at this time. Some searching indicates the Tuya fans only perform network broadcasts rather than multicast (which the Route10 already supports repeating) which aren’t intended to reach outside of their own subnet,
That being said, it appears some people have been able to do with pfSense which has a UDP Broadcast Relay service to kinda force it to work: https://www.reddit.com/r/homeassistant/comments/15cg1sj/localtuya_works_across_vlans_on_pfsense/
And it appears that there’s a package available for OpenWRT, which the Route10 is based on: packages/net/udp-broadcast-relay-redux-openwrt at master · openwrt/packages · GitHub
There might be a way to install it manually on the Route10 via the CLI, otherwise a feature request might be needed for Alta Labs to add that feature in.
That all being said, there might be another way to make this work rather than waiting! I just can’t think of one off hand. Maybe a VM with that relay installed could work? Not sure, just thinking out loud a bit 