1. Can use.
2. But the transmit power is lower than Malaysia/US one if not mistaken. Hence lesser the coverage are.

(Correct me if I'm wrong)

If you're on a budget, Deco on LAN backhaul provide much better performance

Wall plate WiFi is actually really bad in terms of signal penetration

If you want to use ceiling AP, you should deploy 2-3 units per floor else it's better to just get a single high end router on each floor.

Most medium to high end consumer router transmit power is 998mW on 5GHz while indoor Ceiling AP is 400-500mW. All this info is publicly disclosed on FCC filing.

Commercial grade APs are designed for client density and overall sustained performance rather than single device peak performance. Lower TX power would reduce interference and perform better when implemented correctly.

But if budget limited and want to get the best bang for buck, consumer grade high end router / mesh is the best.

I think TP-Link discontinued most of the AX Deco, only left with X20 and X50 but they are kinda low end