iOS 9.3.6. What gestures does this iOS have?

Here is a link from Apple about Gestures on iPhone. But it you look for an older iOS version in the link it goes back to iOS 12 and not further back. Whether these will work on an iOS version that was released now over 8 years ago, on an iPhone which was released 12 years ago, I can't possibly know.

Learn basic gestures to interact with iPhone - Apple Support

Posting it's not working here won't help you. Let Apple know, but it may not be much of a priority to keep a page available for a phone released in 2011, 12 years ago.

You can provide feedback to Apple here --> Feedback - iPhone - Apple

And I'll tell you the same thing. I don't know. You're asking about an ancient iPhone, released 12 years ago, which is actually worthless and I don't remember what it did or didn't do at this point. Please keep in mind that iOS 9 was replaced by iOS 10 in 2012. Any updates past 2012 to iOS 9 were security updates, not feature updates. So yes, iOS 9.3.6 may have been reeleased in 2019, but that would have been purely a security update, which changed NOTHING in terms of features. You are still dealing with an iPhone which is obsolete and no longer supported at all, not even with security updates.

Perhaps some of your questions can be answered here --> About iOS 9 Updates - Apple Support'

Asking me more questions about your ancient iPhone will be pointless. I don't have the answers.

Yes, you're right on the progression of iOS.  It still doesn't make much difference, when you're topic of discussion is an iPhone released 12 years ago.

On your windows question, see this link --> Download iCloud for Windows - Apple Support

iPhone applications don't run in iCloud on a computer. They run on an iPhone. Before you even try to download the application to your iPhone, you need to see if it can possibly run on an iPhone running such an out of date iOS version. You may find it can't because the app is no longer supported on such an out of date iOS version. If you want to write back and tell me the app, I'll let you know if it can even run on iOS 9.3.6.

I'm not sure what you are asking? iOS 9.3.6, is ancient and no longer supported and can't run most modern apps. An iPhone 4s is so old at this point to be pretty much useless.

Can you better describe what exactly you are looking for?

I can't possibly remember what gestures were available all those years ago when iPhone 4s was current. Keep in mind it was released in 2011, which was 12 years ago. Much has changed in more than a decade.

Maybe this will help you --> Apple - Support - Manuals