My MacBook Air 2020 is dead

Start with this support article: If your Mac doesn't turn on - Apple Support

If that doesn't help, then I suggest that you make a Genius Bar appointment at your local Apple Store or Apple Authorized Service Provider to have them evaluate your notebook and provide you with your options.

MacBook Air was in Genius Bar today. Employee was able to get to the Home Screen. Worked at home for a while but now screen is blank again. Plugged into charger for 90 min and screen is still black

MacBook Air was in Genius Bar today. Employee was able to get to the Home Screen. Worked at home for a while but now screen is blank again. Plugged into charger for 90 min and screen is still black