I saw a new item from Roku, Inc. with FCCID TC2-R1026 and name is 10002421  .it is osum. I think you should check it out. https://fccid.io/TC2-R1026

Thanks!

Interesting. It's for the 2.4 and 5 GHz WiFi bands, but also shows Bluetooth overlap. Perhaps they're adding support for BT headphones. It shows a confidentiality release date of Feb 28, 2020, so I would expect a product announcement near that date. Can't figure out any additional details from this, as it's simply the request for the FCC ID number, which is required for anything with a transmitter. 
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Actually looked at a test document, and it confirms that Bluetooth is included, as it was tested separately from WiFi. However, it only shows testing for 802.11B/G/N but no mention of AC.

Is that the upcoming Roku Relay? https://support.roku.com/article/360019476953-how-do-i-set-up-roku-relay-

That's certainly a possibility. That link shows a Bluetooth connection is used for configuration. It doesn't mention if the Relay supports 11AC, so can't confirm or deny if it matches that FCC information. I also can't find what model number Roku has assigned to the Relay, but the FCC info shows a model number of R1026. Certainly doesn't fall into the range of existing players/TVs, and with the R prefix it does fit with Relay. I had never heard of the Relay, but I have multiple WAPs in my home so don't have a signal issue anywhere so would have ignored it anyway. 

A WiFi extender.. yawn.