How to forward BLE messages to Home Assistant via API

I am in a tweaking mode to forward BTHome messages to Home Assistant .
(project Beethowen - BTHome over ESPHome)

With 3023.6.4 and the rework of @jesserockz the previously working workaround is not functioning anymore as APIConnection is hidden in a protected field.
Any ideas?

I could come up with two possible solution ideas

  1. generate the HA event in ESPHome and us the forwarding channel of bluetooth_proxy → blocked

  2. use a HA sevice call and inject BTHome message from Home Assistant itself → no service exposed for BTHome integration

        esphome::api::BluetoothLEAdvertisementResponse msg;
        msg.address = client_mac_a64;
        msg.service_uuids.push_back("0x181C");
        // msg.rssi = -99;

        // BTHOME V1
        {
          esphome::api::BluetoothServiceData btsd;
          sd.uuid = "0x01"; // V1 must have header
          sd.data.assign({0x06});
          msg.service_data.push_back(std::move(btsd));
        }
        {
          esphome::api::BluetoothServiceData btsd;
          sd.uuid = "0x181C";
          sd.data.assign({
              0x02, 0x00, 0xB3,      // pkt id
              0x23, 0x02, 0xD2, 0x09 // temp
          });
          msg.service_data.push_back(std::move(btsd));
        }
        esphome::api::global_api_server->send_bluetooth_le_advertisement(msg);