Embedding Excel spreadsheet into web app

Hi,

I am following this tutorial to embed an Excel spreadsheet (that is one One Drive) to another web app via an iframe.

https://support.office.com/en-gb/article/Share-it-Embed-an-Excel-workbook-on-your-web-page-or-blog-from-OneDrive-804e1845-5662-487e-9b38-f96307144081

However, I don't see any "Embed" options like the article suggests - so I'm stuck.

Any ideas?

Thanks.