No one (aside from the companies themselves) can reliably tell you what ONN (Walmart) or Roku or Apple has planned for expanded AirPlay2 support in the future for Roku devices, just what is supported now.
You need to check your TV's model # as indicated in the article information below to see if your TV qualifies for AirPlay2 support.
https://support.roku.com/article/360057488733
Is my Roku device compatible?
To determine if you can use AirPlay and HomeKit with your Roku device, you need to know the software version and device model. To find this information, go to the home screen and select Settings > System > About.
The Roku devices listed below support streaming with AirPlay 2:
Device Model
Roku TV™ | Axxxx, Cxxxx, CxxGB, 7xxxx |
Roku Streambar™ | 9102 |
Roku Smart Soundbar | 9101, 9100 |
Roku Ultra | 4800, 4670, 4661, 4662, 4660, 4640 |
Roku Premiere | 4630, 4620, 3920 |
Roku Streaming Stick®+ | 3811, 3810 |
To use AirPlay and HomeKit, your compatible Roku device must be running Roku OS 9.4 or higher. Your Roku device checks for an update every 24-36 hours or you can manually check for a software update if necessary.
