How to export the map from height + normal + mesh channel?

[APKHiHe_APKHiHe2055]

After finishing texturing I noticed that 99% of my height and normal modifications were being drawn on this weird combo height + normal + mesh channel and when I exported the textures my normal and height maps are completely flat. Is it possible to transfer this channel to correspondings ones or do I have to do heights and normals from scratch