The Act is enforced by Ofcom, which publishes codes of practice and guidance that services are expected to follow. For dating services the key duties include assessing and reducing the risk of illegal harms such as fraud and abuse, offering reporting and complaints routes, and using highly effective age assurance to stop children accessing the service.
Ofcom can fine services that fail to comply. Check Ofcom's current guidance for exact dates, duties and penalty levels before relying on any summary, including this one.