How do I find out when the next US congressional hearing is regarding ___?
This is not a question for discussing current events surrounding Gamestop and Robinhood.
I expected "when is the next hearing (gamestop OR robinhood)" to tell me exactly that, or at least someone saying that it's not scheduled yet. But 50+ pages of Google results yield no positive answer—and verbatim, Any time, Past 24 hours, and Past week, I've tried them all. I know it seems likely it's not scheduled, but it's hard to be sure since results are flooded with news leading up to and about the previous hearing. I can easily imagine all that drowning out newer information.
I've also found comments across several Reddit threads asking this question, but not a single reply confirming that it's not yet scheduled. Given the sheer number of users on Reddit, this is strange and IMO indicates that the answer is not known, rather than trivial or well-known.
Having figured it out, I'm posting a self-answer with general steps.