Low on option, I don’t think so, they still have a handful of exchanges that are operating within them, don’t forget that Binance even created a special exchange for them, Coinbase is still there, kucoin is there, and others. It is only Polenix that I know is shutting US traders out of their platform without making any provision for them, and who cares much about Polenix anyway, they already lost their glory and I don't think that it is now they should be doing all these that they are doing.

The best exchange has been binance, and that has also been the choice of most United states citizens, which they now have a separate exchange from them too which they can carry out their trading transaction, so US is not running low on any exchange.