Many home treadmills include adjustable slope settings

https://treadmillmdhy624.theburnward.com/10-things-you-learned-in-kindergarden-they-ll-help-you-understand-treadmill-at-home

Lots of home treadmills include adjustable slope settings, allowing you to replicate outside terrain for stronger legs and better workout variety, whether you're training for hills or burning more calories.