The authors seem to think that cancer is less deadly now, but they also note that increased screening likely increases the prevalence of cancer: Introduction:

The authors seem to think that cancer is less deadly now, but they also note that increased screening likely increases the prevalence of cancer: Introduction: "Currently, it was reported that the promotion of cancer screening strategies and the exposure to risk factors in early life or young adulthood may increase incidence of early-onset cancer... Furthermore, changes in diet, lifestyle and environment since the turn of the 20th century, resulting in increased rates of obesity, physical inactivity, westernised diets and environmental pollution, may have affected the incidence of early-onset cancer. Additionally, alcohol, smoking and detrimental pregnancy exposures may have also affected the incidence of early-onset cancer" Conclusion: "Our study showed that the global morbidity of early-onset cancer increased from 1990 to 2019, while mortality and DALYs slightly decreased."