Filter to show all parent rows and tasks under a single parent row

I have a sheet that is broken up by 4 workstreams. I would like to be able to apply a filter that only shows me anything under 1 of those workstreams. An example of my hierarchy is below. I want to be able to filter out anything in workstream 1, 3 & 4 so I am left with all parent rows and tasks under workstream 2:

Unfortunately, I can only find answers that will allow me to filter for 1 level of parent rows. I also would like to mention there are about 30 different people adding tasks into this plan and is done so on a daily basis- so the idea of using a checkbox to identify the rows I want to filter would require me to go in regularly and manually check any additional rows that have been added by other resources.

Any help is appreciated. Thank you!!



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