Lots of home treadmills include adjustable slope settings
https://hometreadmills.ukfrnq161.nexorafield.com/posts/why-the-at-home-treadmill-is-beneficial-in-covid-19
Lots of home treadmills include adjustable incline settings, allowing you to imitate outdoor terrain for stronger legs and better workout variety, whether you're training for hills or burning more calories.