Используйте приложение APKPure
Историческую версию assistive touch iOS 14 можно получить на Android
Assistive Touch для Android: добавьте на свой телефон эту кнопку для быстрого доступа
Assistive touch for android add to your phone this button for quick access
use AssistiveTouch to access your Home screen, Recent screen and use Back Key. Just open the AssistiveTouch menu and tap Home, Recent, Back action.
long press on app> app info> allow auto-start to get the app runing all the time
long press on app> app info> go to permissions> give the app the permissions necessary for it's functioning> enjoy a professional assistive touch that looks cool