Is achieving the theoretical throughput of 2 Mbps possible with BLE radio with 2M PHY?
Unfortunately, no. At the time of this writing, even with 2M PHY enabled, BLE 5.x radios have a limitation of 1.2 - 1.5 Mbps due to the packet format. In order to achieve throughput of 2Mbps or higher you would have to use a different RF Technology, such as Wi-Fi.
Please see the Application Note for Throughput Testing with Bluetooth 5 LE 2M PHY Feature for the BL65x module.
- Throughput Testing with BT 5 - LE 2M PHY Feature v1 0.pdf
- Throughput Testing with Bluetooth 5 - LE 2M PHY Feature - BL652.pdf