I didn't read either of these; just pulled them from the top results on Google with context from the articles

[r]outine consumption of diet soft drinks is linked to increases in the same risks that many seek to avoid by using artificial sweeteners—namely type 2 diabetes, metabolic syndrome heart disease, and stroke

https://pubmed.ncbi.nlm.nih.gov/27606166/

Diet soda may help you cut calories in the short term, but some evidence suggests that it could cause you to crave more sweet, high-calorie food over time. 

Women and people with obesity might be especially sensitive to cravings linked to artificial sweeteners

https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2749350