I bought the game on DriveThru and it looks awesome! Any chance you might make the terrain icons available as separate PNGs to download to use with collaborate online drawing tools? My group is remote so we're going to have to somehow draw the map remotely…
I recommend https://hextml.playest.net/ as your online drawing tool. The working map can be downloaded and passed from one player to the next. Use screen share while each player takes their turn.