hey there,
Unifi is unfortunately very serious about wireless uplinks to non-unifi routers, it doesn't support that fearture Ac series, but generally, yes there's a solution called Wireless uplink which let us have feed from another radio.
I know how exactly to set this, but not sure that AC LITe support non-brands.
I can give it a try for you.
if it doesn't be my guest then.
Regards.