Hi,

It is possible to use 3D Gaussian Splatting in Unreal Engine with plugins, such as the Volinga plugin. Any plugin that works in the standard Unreal Editor will also work in the Unreal Editor for Aximmetry.
However, some plugins do not support cooking. In these situations, you can always use Live Sync or Editor Data mode. More information on these workflows is available here: https://aximmetry.com/learn/virtual-production-workflow/obtaining-graphics-and-virtual-assets/creating-content-for-aximmetry-de/interactive-editing-with-live-sync/ 
For instructions on adding third-party plugins to Unreal Editor for Aximmetry, refer to this guide: https://aximmetry.com/learn/virtual-production-workflow/obtaining-graphics-and-virtual-assets/creating-content-for-aximmetry-de/advanced-information-and-features/how-to-install-third-party-code-plugins-for-unreal-editor-for-aximmetry/ 

Note that some earlier versions of the Volinga plugin supported cooking, but to my knowledge, the current version does not.

Warmest regards,