FortiGate 60F (FortiOS 6.4.6) – Compatible FortiAP models?

Hi Team,

I am currently using:
-Device: FortiGate 60F
-FortiOS Version: 6.4.6 build 1879 (GA)
Current AP: FAP-221C (unstable / planning to replace)

I would like to know:

1. Which FortiAP models are fully compatible with FortiOS 6.4.6?
2. Is WiFi 6 AP (like FAP-231F / FAP-234F) supported without issues?
3. Will existing FortiAP profiles auto-apply to new AP?

Environment:
- Medium office
- Using FortiGate as wireless controller

Any recommendations for stable AP models would be appreciated.