Disable/delete default workflow

Hi there,

In our org, we have the Hardware team and the FW/SW team, Product, Marketing, Ops etc, and of course they need different workflows.
The problem I ran into was that even if I configured any of the workflows in the space setting that I wanted to prioritize, I couldn't prevent the team from selecting the initial status from default workflow they creating new tasks.
This led us to realize that different completed/in progress from different workflows appear in the dashboard's pie chart.
Is there any way to delete/disable default workflow other than updating the default workflow to what the team needs in different spaces? The same situation still occurs in the Joint dashboard.

Best,
Victor