It is likely that you used one of the hill services that give you free mining in exchange for downloading some sites or leaving the browser running.
It is a method that will not make you any money, and if you do, then it is most likely that it is a fraud. They are seeking to either leave side doors with your phone or any other scam.
If you buy mining hardware, you will choose the address of the wallet you want to withdraw to.
Websites and applications that provide these services to any customer for whom he can do free mining through them are undoubtedly scams, and he will not be able to withdraw his funds in the end, and even if he can withdraw his funds, the output can be a few cents after he consumed the resources of his device and wasted a lot of electricity, the Internet and time, Mining can be a good source of passive income, but it may not necessarily be profitable due to the fluctuations of cryptocurrencies, and therefore whoever wants to mine must choose the powerful hardware, the correct software, and mining platforms for the currencies that he will mine, and he must have the good technical knowledge to prepare mining devices, and I advise anyone who has no experience in mining to educate himself and do his research and not to waste his time in cold mining sites and not to invest in Ponzi scheme sites that claim to have vast and stable profits for investors from mining profits.