The main cause of esophageal cancer is esophageal acid reflux. Mainly smoking and drinking. Some painkillers may also cause problems.
As for whether soda can cause esophageal acid regurgitation, the theory put forward by related studies is that drinking soda can indirectly cause valve dilation between esophagus and stomach, which can increase the probability of acid regurgitation. This theory can be established.
But more scientific clinical trials are needed to further prove it.
Related research is not very scientific, and more accurate and powerful clinical data are needed to prove that drinking soda can cause esophageal cancer.