I don't know if it'll help, but I've been using NextDNS [0] to block ads on my Roku TV (and general network-wide adblocking). In the NextDNS dashboard, there is a setting under Privacy > Native Tracking Protection that has an option to block Roku trackers. According to their source code [1], I think it just blocks logs.roku.com, but works for me.
Additionally, there was another Roku domain that I blocked at the router level that also helped (I think it was something like scribe.roku.com, but can't confirm until later today).
Additionally, there was another Roku domain that I blocked at the router level that also helped (I think it was something like scribe.roku.com, but can't confirm until later today).
[0]: https://nextdns.io
[1]: https://github.com/nextdns/metadata/blob/master/privacy/nati...