I created a new career world and all of the resource icons were on the map but as i played the world a lot off them dispersed including fish trading. The start of world save is here (all icons showing) :

"https://drive.google.com/drive/folders/1ceVJ4af0fpJMbsgIINVRZONOiAaUNYl9?usp=drive_link"

the later in game save is here (several icons disappeared) :

"https://drive.google.com/drive/folders/1imC8xXSsoMWSf0iqVXlzA86CTBnm4FYO?usp=drive_link"