Modern view for task lists and calendars?

You can use an iframe in an embed web part to get a calendar view, it's not perfect but works for me.

<iframe width="100%" height="1000px" src="https://xxx.sharepoint.com/sites/xxx/Lists/Calendar/calendar.aspx" scrolling="no" style="margin-left: -200px; margin-top: -190px;">
</iframe>

Yuliya Haradniuk posted it here - https://techcommunity.microsoft.com/t5/SharePoint/calendar-web-part-on-modern-pages/td-p/161291