[OpenRoads Technology - MXRoad] How to design drainage using OpenRoads and not from MXDrainage/Drainage Design in MX?

Hi,

I'm exploring the functionality on OpenRoads Technology on MXRoad (Inroads and Geopak is not favourable in Malaysia),

I came across to design the drainage portion and stuck, I can't find any specific tool to design the drainage,

Please advise,