Yes eggs are acidic.
Eggs are acidic and acid forming so if you have Acid Reflux disease then the eggs may upset your stomach and cause more acid buildup in your stomach.
I notice when I eat eggs I can feel some acid buildup in my stomach but I don't suffer from Acid Reflux disease.
However if I did suffer from Acid Reflux disease I would need to avoid the eggs.
Most high protein foods including foods even low in protein can be acidic and cause issues when you have Acid Reflux disease.
Some other foods that are acidic besides eggs are foods such as legumes, meats and fish.