Sharepoint online embed calendar into mainpage

I was able to accomplish this by choosing the embed web part. I used an iframe and added the string query ?isDlg=1

Here's what it looked like:

<iframe src="https://xxx.sharepoint.com/xxx.aspx/?isDlg=1" frameborder="0" width="100%" height="110%"></iframe>

Hi @Kelvin Shee , welcome to Q&A forum!

Per my test, if users use embed code to display the calendar, the entire page will be displayed instead of the details. There is currently no OOTB way to change this behavior.

As a workaround, we can try to use list calendar view. We need to create a modern Calendar view and set it as the default view, then embed it.

Please refer to this blog for more information:
Using the SharePoint Modern Calendar View
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