Rebuild navmesh manually

I’m developing a game for mobile devices where I’m generating the environment procedurally. When the navmesh creation is set to static, it evaluates before the environment gets generated, so I cannot use that. The problem with the dynamic navmesh generation is that it’s too demanding on the performance for a mobile device.

So basically I’m wondering if there’s a way to generate the environment first, then build a navmesh once. No need for further navmesh updates throughout the game. Is there a blueprint command to rebuild the navmesh or to somehow add a delay to the initial navmesh generation?