Pretty sure Robinhood developed their own clearing house so they didn’t have to rely on an out side firm .....It's not the brokerages doing this, it's the clearing houses they use. They have no control over this. Clearing houses like Apex changed the status for those tickers to Closing Only Order status. You can still sell and close out options contracts. You just can't buy or open.
Robinhood launches its own trade-clearing system as customer growth surges