Live broadcast by mobile phone: put the mobile phone at a proper angle, only shoot your body or parts, don't shoot your face and avoid showing your face.
Use a virtual background: If conditions permit, you can set a virtual background to cover your face and only reveal the game screen.
Live voice: If you don't want to show your face, you can just live voice and communicate with the audience.
Use camera cover: put some covers in front of the camera, such as books and cartons, to avoid showing your face.
Please note that these methods may affect the live broadcast effect and audience experience, and it is recommended to choose according to the actual situation.