Well sure it looks well and all but its not something i would use also your correct with the gamemode that thing is just a Warning.
Its pretty basic im not the best with these types of things the only thing im looking for is just something that keeps track of enemy AI already in place in the level and when they are gone it just executes whatever next level and as simple as possible im not adding any of these to AI or Player Character im looking for a simple “Are all of these AI here? If So dont load the next level” are they all destroyed and no longer in place in the world? Open the next level".
Also the code has to be in the Level Blueprint.