Should we provide an explicit close button in the dialog, to play well with gesture navigation?

Question

Few years back, when Android is still using 3 buttons navigation, it makes sense not providing an explicit closed button for dialog.

3 buttons navigation

There are 2 ways to close the dialog

1. Tap on the back button (Circled in red)
2. Tap anywhere outside the dialog

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However, when using the new gesture navigation, it isn't clear on how to close the dialog.

Gesture navigation

There is only 1 obvious way (maybe not obvious to some users) to close the dialog

1. Tap anywhere outside the dialog

Another non-obvious way, to swipe at the left edge.

Do you think, should we provide a "x" button at top left, or an "OK" button at bottom right, to enable users to close the dialog, in an easy way?

Answer 1

I had the same problem with a modal window that closed when clicking outside the window, but there were some users who didn't understand it and couldn't find a way to close the modal. I chose as a solution to place a ✖️ symbol outside the window without any added action, in this way whoever clicked outside the window, whether on the symbol or anywhere else, closed the window.