Radio frequency ablation following EC diagnosis

My husband (67 years old) was diagnosed with stage 3 N0M0 in July 2024. He received 3/5 planned chemo treatments as well as radiation. The radiation treatments were stronger than standard treatment. At the time of diagnosis, the tumor was so large while doing an endoscopy the scope could not pass through region where tumor was located. The tumor was in the presence of Barretts Esophagus (never had any symptoms of this). He was not a candidate for surgery due to multiple other health issues.
We have had regular CT scans and endoscopies that have looked ok since completing treatment. GI doctor in January 2026 off the cuff following that endoscopy that he may want to do an ablation along with the endoscopy next time. We went into to GI office and saw PA who basically did vital signs, went over meds and had consents for procedure signed. EGD/Ablation were done on June 19th. My husband had been having some difficulty swallowing and feeling as though food did not want to go down prior to this procedure. Now things are much worse. It has been 3 1/2 weeks since the procedure.
We saw his radiation therapist who seemed a little surprised that an ablation was done to that area because of having higher risk of strictures. My husband also had CT scan (chest, abdominal, pelvis) 2 1/2 weeks following ablation. CT showed 2 lymph nodes that had grown since prior CT in December 2025. CT also showed increased thickening of the esophagus. Radiation oncologist thought maybe this was related to having the ablation and the ablation was causing the inflammation.
When the GI doctor completed endoscopy/ablation we were told we have to go back for a repeat endoscopy/ablation in 4-6 weeks and then continue this regimen every4-6 months going forward.
Has anyone gone through this type treatment? My husband is struggling everyday to eat following the ablation. Drinking liquids even pose a problem at times. We were never informed this would be something that had to be repeated. We thought it was a once and done treatment. I would love to hear back from others who have also experienced this.
Thank you!