Your friend just plays the role of business introduction, which is equivalent to the salesman of the insurance company.
Buying wealth management products now is a risk investment, not a risk-free capital preservation as before. This kind of risk is for investors to bear.
Your friend promised to refund your money, but he has a good character and attaches importance to friendship with his friends, which is not an obligation he must bear in law. In other words, it is ok for him to go back on his word now.