I found this article about a known issue where the 3D View isn't available in the FME Data Inspector when using Remote Connections but I just wanted to share a solution which worked for me. I would have linked the article on the other link but I couldn't find a way to comment there.

this link here outlines some steps you can take:

https://knowledge.civilgeo.com/knowledge-base/enabling-gpu-rendering-for-microsoft-remote-desktop/

I didn't follow all the steps (only step 12) and it's working for me.