Looking for a GI with expertise in treating post gastric surgery digestive issues.

This is Steve. Had my GIST open surgery resected from my antrum in July 2024. I'm suffering from nightly (overnight) stomach discomfort (which wakes me) and other nerve type dysfunction and other digestive issues. Was happening on and off over the months but now consistently since 12/27. Can anyone recommend a GI with expertise in post gastric surgery GI issues in the Metropolitan NYC or Metro Philadelphia areas?