鸿蒙不支持SSE通道么？

鸿蒙创建 const channel = new uniCloud.SSEChannel() 通道报错
18:23:35.180 SSE通道错误: [⁠TypeError⁠] n2[e2] is not a function at src/utils/sse-channel-utils.js:55
18:23:35.180 SSE通道初始化失败: [⁠TypeError⁠] uni.offPushMessage is not a function at src/utils/sse-channel-utils.js:67