Yes, it's in the manual. You can download it from the manufacturer.

Hello, I use this router as an access point with a SIM card. The network is extended with TP-Link wifi relays. I don't know if it can work with an additional ZenWIFI AX Mini access point...
Sincerely

I don't think this will work. You would have to have a mesh system from TP-Link's Deco series to integrate the router in this way. If you connect your Asus system via cable as an uplink to the router, you can combine it.

Access works as with other routers but I have not yet tested the use of mesh extenders (supposed to work via TP-Link DECO Extender). Via
the WAN/LAN ports can certainly be used to connect an external mesh router.