What mobile phone of Huawei supports lr key?

1. Huawei's mate30 has set LR. For example, after Huawei's mobile phone opens the game, an option will pop up in the upper left corner to open the application assistant interface.

2. After opening the page, set the switching option with an LR key on the right;

3. After the LR key is turned off, the LR key will be displayed on the interface.