Proof? Or speculation?
Here is one...
https://www.globalresearch.ca/top-oncologist-cancer-patients-exploding-after-covid-shots/5800717
Here is another....
https://expose-news.com/2022/12/15/us-gov-covid-vaccination-1433x-risk-cancer/
There are many others. Just like the heart problems, this is developing. But the overall immune system is suppressed by the shots. This reduces the cancer fighting activity.
It’s happening.