This could work, but it’ll be a very heavy, dense loaf. The recipe is already weighted down with fruit and nuts, so adding the density of whole wheat might make it almost too heavy. How about using https://hostessatheart.com/whole-grain-bread-recipe/. It’s already set up to work with 100% whole grain. Use the same amounts from the cranberry walnut bread: 1 cup dried cranberries (or 3/4 cup) and 3/4-1 cup chopped walnuts.
Add them during the mixing stage, just like you would in the yeast bread. Make sure you keep the honey and oil which is designed to keep it soft. Your bread will be a bit heavier but still delicious. Please let me know which way you go. Thank you and happy baking!

Thank you, Amy!

Oh I love that combo, Ann! Thank you.

Thank you!

I’m with you, Grace! Homemade bread is the best.

Thank you, Radha!