I drew the textures in Substance Painter, and also checked how houdini and SP work together to work with textures normally without artifacts (most often these are the edges of polygons marked with a shine, or completely incorrect reflections) I used the export to allembic - this format stores all attributes and the necessary groups. But before baking maps, you need to check if the polygons are repeated in different groups. You can simply clear all groups and create new ones for the necessary parts.
After all the procedures, I reimported into UE 5 and created a material with Color, Roughness maps