Yes. We support simulated trading of Coinbase-listed tokens, and just the USD pairs.
For example, you can trade BTCUSD, ETHUSD, SOLUSD, and more than 200 others. But if you try to trade ETHBTC for example, we would reject that trade. In fact, our Manual Trading page only lists the USD pairs we support. Sending us trading alerts from other platforms like Tradingview is where you need to be careful to select Coinbase traded USD pairs only.