After some searching, I've found a government article that did a study on Creatine and Whey Protein combo benefits and they comes to the same conclusion that it doesn't provide any additional benefits. This claim is true.
https://pubmed.ncbi.nlm.nih.gov/18309444/
Eliot, K. A., Knehans, A. W., Bemben, D. A., Witten, M. S., Carter, J., & Bemben, M. G. (2008). The effects of creatine and whey protein supplementation on body composition in men aged 48 to 72 years during resistance training. The journal of nutrition, health & aging, 12(3), 208–212. https://doi.org/10.1007/BF02982622