Bug: TV controls for IR hub mini don't show up in iPhone Home App. Also, Speaker ON/OFF button does not work
### Describe The Bug

The "Accessories" tab of the Homebridge portal shows a square for TV ON/OFF that works OK, and a second button for TV Speaker ON/Silence that does not work. None of them are shown in the iPhone Home App.

### To Reproduce

Don't know.

### Expected behavior

I would expect the TV control buttons to appear in the Homekit App in the iPhone. Also, I would expect the Speaker button to work.

### Relevant log output

```shell
[07/01/2022, 11:01:14] [SwitchBot] DIY TV: LG 49UB850V Sending request to SwitchBot API. command: turnOn, parameter: default, commandType: command
[07/01/2022, 11:08:45] [Homebridge UI] [admin] Accessory layout changes saved.
[07/01/2022, 11:09:27] [SwitchBot] DIY TV: LG 49UB850V Sending request to SwitchBot API. command: turnOff, parameter: default, commandType: command
[07/01/2022, 11:11:22] [Homebridge UI] [admin] Accessory layout changes saved.
```


### Config for homebridge-switchbot

```shell
{
    "name": "SwitchBot",
    "credentials": {
        "openToken": "xxx",
        "notice": "Keep your token a secret!"
    },
    "platform": "SwitchBot"
}
```


### Screenshots

![image](https://user-images.githubusercontent.com/96777527/148550337-a67bfcaa-bc3d-46ac-826e-f8ce082be6ca.png)


### Device & Model

Switchbot hub mini

### Node.js Version

v16.13.1

### NPM Version

v8.3.0

### Homebridge Version

v1.3.9

### Homebridge Switchbot Plugin Version

v1.7.0

### Homebridge Config UI X Plugin Version

_No response_

### Operating System

Raspbian GNU/Linux Bullseye (11)