For some reason, I have the option for the focus mode reducing interruptions on my iPhone 14 Pro even though it can't support Apple Intelligence. I got it after I activated Apple Intelligence on my MacBook Pro, and when I added the Reduce Interruptions mode on my computer, focus.
Here is the option in settings (I just used iPhone Mirroring on my Mac and screenshotted it that way):
Here is the option in settings (I just used iPhone Mirroring on my Mac and screenshotted it that way):