Leveraged trading is regulated and legal in numerous countries across the globe. For example:
US – National Futures Association (NFA)
Australia – Australian Securities and Investments Commission (ASIC)
UK and Europe – Financial Conduct Authority (FCA), the European Securities and Markets Authority (ESMA), Cyprus Securities & Exchange Commission (CySEC)
Singapore – Monetary Authority of Singapore (MAS)
Note, in 2021 India banned the retail trading of many leveraged products.