Earlier quoted context omitted.
M1, E-Trade, Trading 212, Interactive Brokers, TD Ameritrade/Schwab and WeBull halted options as well.[1] There are a few more I'm missing. I wasn't happy about it but I don't blame them. As much as people were talking about over 100% of GME shorted, I can't imagine how much margin on top of margin people were trading while there options had yet to be settled. If anything the issue should be how long it takes a trade…
I don't know the exact situation with all of them, but at least Robinhood and WeBull both occurred due to reliance on Apex Clearinghouse
Robinhood has been self clearing for years before the GME incident