Hi @Toriyama ,
As you mentioned, we can embed the report on the page through the web part 'Power BI', part of the process is 'Get a link to securely embed this report in SharePoint page'. A link can only correspond to one report , in addition, there are other dashboards and datasets in the workspace besides reports. There is currently no OOTB way to place an entire workspace on a page.
Reference: Embed the Power BI project report in SharePoint Online
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