Here's a link with ideas, Pat:
Hang a picture or a wreath, or perhaps 3 embroidery hoop wreaths. You can also use wall stickers to put a phrase you like on the wall above the headboard.
I made a DIY wreath to hang above my headboard: https://momhomeguide.com/farmhouse-style-spring-bedroom/
You can add a vinyl monogram or a landscape picture.
You could add a sign, a wreath, create a small gallery wall, or a mirror