When accessing the Fox Sports app/channel or using FoxSports.com, you may need to select your tv provider (and login as required) so that Fox can verify that you also have access to Fox Sports (FS1).
Apps are usually considered as smart phone based (and you have icons for each on your phone) and apps/channels are usually considered when using a streaming service (and again there are icons for each one. I am only familiar with Roku and Firestick). Computers can refer to them as either apps or websites (FB is considered by many to be an app even though you get to it by typing in their URL). When using a computer, this is why you need to enter the URL,
www.foxsports.com in order to reach the website (or you can add them as a Favorite and your browser saves the URL).
As I recommended above, if using a computer to access SNY's streaming using Fox Sports, try viewing the schedule for Nov. 14, or any day before then, and make sure you can view what events are on their schedule.