It might be a block on your router.
Contact your ISP and ensure that no blocks are turned on.
Hey everyone! That’s right- thanks for your answers.For security fixes - yes. But not application functionality updates.
Functionality updates only apply to current OS. Safari and the OS only get most security fixes for 3 years.
Web protocols are evolving, so some web sites don't work with old browsers. Fall back for a few further years is to use Firefox on macOS. No simple fallback for iPhone and iPad.
Just a quick heads up: check your firewalls and security settings to see if there’s anything blocking you from viewing webpages on Safari.
Flash player is no longer supported, and many browsers you use now require Java, JavaScript, and HTML5.
Also, if you’ve downloaded an app from your ISP on your iPhone, make sure to check the settings on the app. They also have a contact number if you need help.