Safari Support Policy

I am trying to find an Apple reference document on the Safari support lifecycle. I have found a wikipedia article that seems to do this here (https://en.wikipedia.org/wiki/Safari_(web_browser)#Version_compatibility) but I have been unable to find an official Apple document / reference on the Apple site. Does Apple have such a policy defined? How many versions of Safari are supported by Apple? Can a link be shared to some documentation on the support policy and how to check the status? Thanks.