There are already quite a large number of studies looking at creatine's effects on memory in humans, to the point there have been meta analysises of them.

The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis (2024) https://pubmed.ncbi.nlm.nih.gov/39070254/

Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials (2018) https://pmc.ncbi.nlm.nih.gov/articles/PMC6093191/