Statistically, if you're not dying from Measles, Rubella, Chickenpox, Diptheria, Tetanus, Polio, Hib, MenC, TB, Whooping Cough, Pneumoncoccal, Rotavirus, Asthma, maternal malnutrition, maternal thyroid disease, influenza, B-strep, scarlet fever, SIDS from front sleeping in overheated houses, parents drinking and smoking near babies, reductions in choking hazards, safer bedding/furniture standards, compulsory smoke alarms in new builds, rentals and social housing, maternal mortality decreasing prior to Covid (and then increasing again), T1 diabetes, congenital conditions are identified and treated, including in utero, improvements in transplant success rates, identification of and treatment of childhood cancers, reduced numbers of women smoking and drinking heavily in pregnancy, awareness of risks of prescribing teratogenic and other harmful medications in women, more likely to survive dangerous and premature births, compulsory seatbelts and car seats...
That means there are far more people out there that wouldn't have lived to the age they've reached and statistically, an increased number will result in greater numbers having the time for cell replication to go wrong. Add to that improved treatments of cancers that have a genetic element and people whose mothers wouldn't have reached the age of childbirth are being born with their genetic code preloaded for cancer.
And we are far, far better at finding it, so instead of them being deaths where cancer is found at post mortem, many more are recorded as people with a diagnosis of cancer instead of being a death from cancer.