Since iPadOS 13, Notion should show in desktop mode on iPadOS Safari, which is more fully-featured and pretty much fine for touch/pointer input.
In case you're from Notion and reading this, the things I generally don't like about that interface are:
- Animations are oddly laggy
- Full-screen popover modal menus instead of popping over contextually
- Less hover states
- Larger UI elements (I don't personally need these since I use a trackpad)
- Small missing features or different UI (in particular around the settings panel)