Apple’s iOS17 will be released in the UK today at 18:00 or somewhere close to that. The iPhone XS and newer phones will be able to download and install it.
There’s the usual mix of new features and improved existing ones. Check In is a new safety feature that automatically detects when you’re home and lets friends and family know. NameDrop is a new feature that let’s you share your contacts details with another iPhone or Apple Watch just by holding them close to one another.
My advice is not to upgrade until 17.1, then the inevitable bugs can be ironed out without you having to suffer them.
Why not have a read of Apple’s preview here.