I’m using the SpeedyBee F7 V3 flight controller and would like to enable the magnetometer (compass)

[faint chasm]

There's no integrated magnetometer. You need to add one externally, and re-flash the firmware to support it

[ember birch]

When I arm the quadcopter and push the left stick up to increase throttle, the drone takes off briefly, rises about 20 cm, then suddenly starts spinning uncontrollably (yaw or roll), and crashes immediately.

At first, I thought the issue was related to the magnetometer, but since the compass isn’t even active in Betaflight and I’m flying in Horizon Mode, I now believe the problem must lie elsewhere.