@RobertJ Apology for the delay. Yes you can create both Windows Consumption and Linux Consumption Function Apps in the same resource group. The wiki article has the old information and the app service article that you have pointed have the right information. As soon as the new features/enhancement to the product are released the azure docs will be updated by the respective content team. For any of these issue on the wiki/document you can always create the docs bug so the respective team can update them. For this issue you can create the issue here.
For any new app service announcement you can refer to this : https://github.com/Azure/app-service-announcements/issues