Can US citizens stake on Kraken?

Can US citizens participate in staking on Kraken? I understand that staking is a popular way for cryptocurrency holders to earn rewards by locking up their tokens for a certain period of time. However, given the complex and ever-changing regulations surrounding cryptocurrencies in the United States, I'm unsure if Kraken allows US-based users to engage in staking activities. Is staking available to US citizens on Kraken, and if so, are there any specific rules or restrictions that they need to be aware of?