You cannot mine just 1 Bitcoin, instead crypto miners will mine one block, with the reward set at 6.25 BTC per block. Each Bitcoin block takes 10 minutes to mine.
Bitcoin mining is still extremely profitable in 2022. Bitcoin miners are currently mining around $20 million worth of Bitcoin per day. That's $600 million per month. A mining machine costs $2,000-$20,000, making it difficult for anyone but professional miners to mine.