Formula that brings a parent row into a report based on certain date criteria

I'm trying to bring parent rows into a report based on if the child row End Date is within the next 30 days. I've created a helper column but I'm struggling with the formula. My sheet has an Activities column, Start and End Dates etc and Im trying to create a formula that checks the helper column box of any row that has a date in the next 30 days but also checks any parent to that row.

Any help is much appreciated.

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