Search all tabs in entire spreadsheet (Google Sheets)

I am making a simple task manager for three users in Google Sheets.The data is added in separate project sheets:

A summary page splits all data by user (from the "Who" column), and should work when new sheets are added later.

This example project returns the summaries from each project, but each needs to be linked manually.

https://docs.google.com/spreadsheets/d/1-ihWF8MbGetPNjEJty0WFxra3V7oehEB8WqbCyejlSs/edit?usp=sharing

Is there a way to return data from any sheet whose title includes a certain string, for example? Any other suggestions for implementation would be very helpful.