Embed Doesn't Show Up in New Properties Panel
The Embed option appears in the new Properties panel when a Linked object is selected, but doesn't appear when multiple Linked objects are selected.
We have the fix available in the latest release. Please update Illustrator using Adobe Creative Cloud application to the latest build for version Illustrator CC 23.0.3
Please refer to our knowledge base FAQ – https://illustrator.uservoice.com/knowledgebase/articles/1844590 if you face difficulty in update.
Or get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html