The Home Bar is a relatively young element of iOS that first replaced the iPhone’s Home Button starting with the iPhone X in 2017. It later became a part of iPadOS beginning with the 2018 iPad Pro.
It’d be an understatement to say that the Home Bar is the future of the iPhone and iPad platforms, so it’s relatively unfortunate that Apple doesn’t let us customize it at all. Fortunately, a newly released and free jailbreak tweak dubbed HomeSize by iOS developer ahmedmakls lets jailbreakers resize the iPhone or iPad’s Home Bar however they want.