Create NavMesh at runtime

Thank you! But it seems like I can’t spawn NavMesh Volume at runtime In BP. Shoud I try to do it in C++? Is there any pitfalls? I saw some previous topics like this How to build navmesh for dynamically sized procedural level - #7 by Gennady, but there are no clear answer how to create navmeshes dynamicly.
Just in case, I want to create navmesh volume on each special floating battle island and size of Navmesh volume should be around 10k x 10k x 2k units