Just gotten this. Reminds me of WF-1000XM3 but actually fits way better.
The dongle works quite well. Tested so far works with:
PS5, Windows 11 PC, Pixel 8 Pro, iPhone 15 Pro Max. Latency are very good.
As for the Bluetooth, it only works with device which support Bluetooth LE and LC3. So anyone thinking of buying this and switch between your phone and PS5/PC do take note.
and according to the manual:
https://helpguide.sony.net/mdr/2977/v1/en/print.pdf
Devices supporting LE Audio (as of October 2023)
Android smartphone Xperia 1 Ⅴ / Xperia 1 Ⅳ / Xperia 5 Ⅳ (use the latest version of the smartphone software)
For the latest information on the compatible devices, refer to the support website.
So only these three models...

Nevertheless, I tried pairing it with Pixel 8 Pro anyway and it wouldn't connect after paired. I then tried it with Xperia 1 IV and it paired without issue. Latency is similar to Linkbuds S/WF-1000XM5 switched to Bluetooth LE mode.