Recently discovered the new Avios Wallet feature, however I haven't been able to find an option to transfer these combined IB and VY Avios to BA Executive Club (ultimately I want them to end up either at QR Privilege Club or Finnair Plus).

Has anyone found out how, or is it really only possible to use Avios earned on VY flights within the combined Avios Wallet i.e. only redeemable when booking through IB+ or Vueling directly? If the latter is true that'd be a shame.