Like Power BI Dataset, we can't manage or change parameters of dataflows in settings windows. in order to change the parameters of dataflows we have to go to edit mode and then we are able to change...
Giving this my vote. Yes this it's probably something that has been missed when implementing. Because using deployment pipelines we can change parameter values...
I use parameters to limit the amount of data I have when developing (using a folded to 10)
