Just tried a couple of pre-existing fiddles that implement a context menu:

https://fiddle.sencha.com/#view/editor&fiddle/2ljv
https://fiddle.sencha.com/#view/editor&fiddle/2iue

Tried these on an ipad (running 12.1) and on an iphone.

Context menu does NOT appear

Also Grid is flaky and doesn't always appear.

So is Extjs 6.6 supported on i devices or not? It would appear they are broken

This is a big issue.