Edge 1030 Plus → Rally XC200 (device preferences, switch to BLE). Power Balance showing as I expected. No ANT+ Cycling Dynamics (also as expected over BLE). FITFileExplorer shows the left_right_balance is recorded the same as when paired over ANT+.
On the topic of data recording, I had a similar rant recently about the Karoo/2. They’re not recording gear information making SRAM AXS Web useless. Storage is CHEAP. Data should always be recorded if it’s available. There’s always a chance it could be used in the future. Maybe for things we haven’t even thought of yet.