If additional future information is required (such as exogenous variables or carrying capacities) by the model, then they should be included as variables of the new_data argument.
## S3 method for class 'fbl_prophet'forecast(object, new_data, specials =NULL, times =1000,...)
Arguments
object: The time series model used to produce the forecasts
new_data: A tsibble containing future information used to forecast.
specials: (passed by fabletools::forecast.mdl_df()).
times: The number of sample paths to use in estimating the forecast distribution when boostrap = TRUE.
...: Additional arguments passed to prophet::predict.prophet().