Can Koreans use Coinbase?

I'm a bit confused about the use of Coinbase in Korea. I've heard that some countries have restrictions on using certain cryptocurrency platforms. Is Coinbase accessible and operational in South Korea? If so, are there any specific rules or regulations that Koreans need to follow when using Coinbase? Also, are there any known issues or challenges that Koreans might encounter when transacting on the platform? Could you please provide some clarity on this matter?