[Bug] The font size of ECharts used in RN on the HarmonyOS side is obviously too small

### Version

6.0.0

### Link to Minimal Reproduction

https://echarts.apache.org/examples/zh/editor.html?code=PYBwLglsB2AEC8sDeAoWtJgDYFMBcya6GOAHmAQESBf6oAIeg72mB98YH9qlRAvgDRFjDBaQQBJFyK4A5jmgATYUXTSAhmEUEA2pQCCWLMADGynNNgAhAK7TJYSp1ha9YM4qywAyiCnSI0cZQC6HNzoAE6KSsFyxLDeXga8EbBqqFHo0IoAtvh2AM7OONk28sTpiqQEAGwArAAM1UVchCmwaZlUmtLp3hDZYKGQMIVNJWWwAIzltXVRDckpLVmUAJLQAGbAwSX9cAAqOHoAFvzA4gCegynDBADMk1PEM0WpGQsAwmY9wJnBbmYgIOvWIIXUrXAAck3qtlmUXmVAAIjgAG44XQgTLQQGPWCXWCVABMEOmUKxsLsAFlFMEANY4SA-c5RHF4mq1eoBdCidDZHDBCD5dTQ5rPKiAEIzAOnesER2VggAB9QAAqYAIf_Mllpkul2Q8Mm84kAkP8MjAnDxUULhfVKFQCrGI5xmLJqAAsN2qtlGt1sePBtVsVxZztxbrGAE5Jn4gTDhXZtLo4kZTBYrGwiY0UtasLb1L6XfbJu7PX6rq6vbB7QSi3jC9VQySI_ZHM43JqvPS2RwAuwgA&_source=echarts-doc-preview

### Steps to Reproduce

写了个雷达图，但textStyle中fontSize设置的值在android和鸿蒙端实际大小差很多，如何解决？

### Current Behavior


### Expected Behavior


### Environment

```markdown
- OS:
- Browser:
- Framework:
"@wuba/react-native-echarts": "^2.0.3",
"echarts": "6.0.0",
"react-native": "0.72.5",
"@react-native-oh/react-native-harmony": "^0.72.82",
```

### Any additional comments?

RN 使用echarts ，在鸿蒙端字体明显偏小，大概是三倍，使用px无效，使用em鸿蒙有效但ios无效，android会过大。