IPv6 Live in RokuOS 12.0!
Spent a few hours this morning doing packet traces from my Roku Ultra 4800X to see what might us IPv6. I was susprised.
Of course, whether or not IPv6 is selected may depend on how fast each server responded, so this is an observation, not an authoritative viewpoint. That said:
I see that locally there are multicast advertisements to ff02::fb (Spotify Conenct, Airplay) and ff02:16 (ICMPv6 Multicast listener). So it can share with IPv6 locally!
IPv6 destinations observed
2600:9000:2146:4a00:15:74ef:49c0:93a1 (Amazon Cloudfront - Hulu)
2600:1f14:631:1700:4705:5a9a:fb4a:ded2 (Amazon)
2a04:4e42:4c::375 (Fastly)
2600:1406:3a00:5::17c0:e40a (Akamai)
2607:f8b0:4005:80b::200e (Google)
2a04:4e42:2d::760 (Fastly)
2600:1901:1:c36:: (Google)
2600:9000:2146:b800:9:f47e:5080:93a1 (Amazon Cloudfront)
Roku UX and check for update: IPv4 Only.
Netflix UX, streaming: No IPv6
Hulu UX and stream on IPv6 (Amazon Cloudfront)
YouTube no IPv6
HBOMax stream IPv6 (Akamai)
Prime Video no IPv6
Spotify IPv6 2607:f8b0:4005:80b::200e (Google)
Roku Channel Live TV IPv6 (Amazon Cloudfront)
AppleTV no IPv6
Pandora no IPv6
So, it looks like it's not just a test, but it's live and sending real traffic on IPv6.
I assume it will NOT work on an IPv6 only network but that may be my next test.
Apparenly, not all 12.0 players (yet) have IPv6 activated.
See fo yourself at the IPv6 Secret menu: Home five times, FF, Down, RW, Down, FF.
Supported 12.0 players: https://support.roku.com/article/228844467