Unfortunately, there isn't shader compatibility when exporting to other software. You can export your signs as an FBX file, but you will need to adjust the shaders manually in those other programs.

Yes, Procedural Signs is fully compatible with both Eevee and Cycles render engines.

When you import an SVG into Procedural Signs, it may appear at a very small size. To fix this, enter Edit Mode, select all the vertices, and scale them up to your desired size.