Huawei mate30pro has set the lr key. Why is there no response when I click?

It may be a compatibility problem of third-party game software. Replace another version of this software, or try to download another software of the same type. Lr key setting steps are as follows:

1. After turning on the phone and entering the game, slide the position indicated by the arrow in the upper left corner, as shown in the figure below:

2. The pop-up option selection, and then click to open the application assistant interface, as shown in the figure below:

3. Click the LR key on the opened interface, as shown in the figure below:

4. Then, you can click the LR button to set the switching option, as shown in the following figure:

5. Click this option to open it, as shown in the figure below:

6. Click [Open] to open the LR button on the interface, as shown in the following figure: