According to Robinhood, "If you don’t have enough buying power to exercise your option, we’ll sell the contract in the market for you about 1 hour before it expires." https://support.robinhood.com/hc/en-us/articles/115005656423...
At this point, customer service of the major discount broker I've used for many years is so abysmal that the last thing I want is a free alternative that promises to do more for me. It makes me think of how impossible it is to deal with Google when something goes wrong with their free offerings.
I think social media has become a societal problem because there is so much revenue available from exploiting addictive behavior, and the logic has to lead to brokers trying to catch up. If you are sensible with investing, the system doesn't need or want you.