Hello.
Thank you for your prompt, helpful reply. A friend previously told me about the Control Center method, and it works. I'd rather not have to use it because I always have to swipe two or three times to get the control center instead of other options. It was easy before to go through Settings and turn it on. One can't now, and I'm not sure if that's by design or defect?
Here's a plea to Apple (and Microsoft): I dread updates because you can't seem to stop changing/moving things around for no apparent reason - please stop! Also, please don't destroy useful functionality so one can use 70 more smiling cat emojis. For some (many?) the phone is a tool, not a plaything, and we just need it to work with the least confusion and inconvenience possible.