微信版本，jssdk版本，标签初始化授权，都ok且真机环境

<wx-open-launch-weapp id="launch-btn" username="gh_xxxxxxx">
    <template>
        <style>.btn { padding: 12px;width:200px;height:50px; }</style>
        <button class="btn">打开小程序1</button>
    </template>
</wx-open-launch-weapp>