SEOUL—Apple Inc and Alphabet’s Google are not doing enough to comply with a South Korean law that bars dominant app store operators from forcing app developers to use their payment systems, a lawmaker who spearheaded the amendment told Reuters. South Korea, the first country to impose legislation curbing the tech companies’ payment policies, is expected to make public the initial details of what it takes to comply with the law on Wednesday, an official at the Korea Communications Commission (KCC) said. It amended the Telecommunication Business Act in August to try to curb the tech majors’ market dominance and stop the big app store operators charging commissions on in-app purchases. The law went into effect in September but details of what would constitute compliance are being drafted by the KCC in an enforcement ordinance. Apple had told the South Korean government that it was already complying and did not need …