@Gertjan had that unchecked originally, tried it out in response to a post.
i have fiber straight to the ISP's device, so it's a ONT, router, AP, Switch, alll the things combo unit. when setting it to bridge mode, it displays to you PPPoe credentials. trying to use DHCP will have the device lease you a private IP with no internet access, but with access to its interface.
No official forum or support site for my ISP, but there is a pretty involved and somewhat active forum that has a dedicated section for it. could not find any posts related to ipv6 on pfsense, but i feel like there's a decent shot that someone has a similalr setup there, yes. Tho, not entirelly sure, as there seems to be a weird preference for using a dedicated ONT + off the shelf modem or small board projects + openwrt
is a dedicated ONT worth it? (assuming they and my ISP shake hands)