Just before the end of the year, Virtual Line Studios unveiled their Gaussian Splatting plugin for UE5, Vista Splat Pro. It came with features including real time dynamic shadows, but it also came with a hefty price tag of a little over $1K.
For those who would like to try before you buy, the VLS team has let me know that they are now offering a free trial. The demo comes with the Mip NeRF Garden and Bicycle scene and mainly exists for people to get a sense of how the plugin functions with preset data.
If you want to use custom data, it will require you to purchase the full plugin. Vista Splat Pro is only available on Windows and only supported with Unreal Engine 5.1. Make sure you check your system first, if you're planning on purchasing the plugin. The demo is downloadable from the same page as the full plugin.