I am pasting information for "functional gallbladder disorder" which is a strong possibility based on all of your other studies.
Rome IV criteria for functional gallbladder disorder require:
Biliary pain; Absence of gallstones or other structural pathology
In addition, the criteria that are supportive of functional gallbladder disorder, but are not required, include:
Low ejection fraction on scintigraphy
Normal liver enzymes, conjugated bilirubin, and amylase/lipase
To fulfill the Rome IV criteria for biliary-type pain, patients need to have pain that:
Is located in the epigastrium and/or right upper quadrant
Occurs at variable intervals (not daily)
Lasts at least 30 minutes
Builds up to a steady level
Is severe enough to interrupt daily activities or lead to an emergency department visit
Is not significantly (<20 percent) relieved by bowel movements, postural changes, or acid suppression
Criteria that are supportive of biliary pain, but are not required, include: (a) pain that is associated with nausea and vomiting, (b) pain that radiates to the back and/or right subscapular region, and (c) pain that awakens the patient from sleep in the middle of the night.
You seem to meet the criteria. Discuss this with your Gastroenterologist.