Celcom Fiber.

1. IPv6 address on WAN
Yes and No. incomplete or broken implementation. Router gets functional ipv6 when requested, but it's not delegated to lan. (dhcp pd not responding? idk never did wireshark)

2. Public IP or CGNAT IP on WAN
Both.

3. Do they use PPPoE, DHCP or Static on the WAN interface
PPPoE

4. Static or Dynamic Prefix Delegation for LAN (/56 or /64)
nil (/64 wan)

5. In terms of speed and stability, how good or bad is their IPv6 routing
On par with v4 when tested in router. But since it's broken on lan anyway so its moot.

6. Own router with custom firmware with their service (Merlin, Mikrotik, OpenWRT, DD-WRT, PFSense, OPNSense, etc)
Merlin

This post has been edited by failed.hashcheck: Jan 26 2023, 09:43 AM

Similar to Unifi. SLAAC, DHCP-PD with RA enabled.