> Reviews have found no association between aspartame and cancer.[5][8][10][27][28] This position is supported by multiple regulatory agencies like the FDA[29] and EFSA as well as scientific bodies such as the National Cancer Institute.[30] The EFSA, FDA, and US National Cancer Institute state that aspartame is safe for human consumption.[7][31]

https://en.wikipedia.org/wiki/Aspartame#Cancer

Plenty of citations there if you need to deep dive any further.