Not technically "Accessibility" but Android has a "developer" setting called "Show Touches" which puts little dots on screen when you touch it.
I find it acts a little like being able to see the cursor on a desktop or laptop; it provides a little bit of immediate feedback that the system recognized your intent, and helps make it clear whether it's the OS or just the app when things are getting laggy.
I think that this setting should be promoted out of developer settings as i find it so useful