I print loads of Esun PETG it’s hard to setup but does print good. You want to drop your flow ratio down it’s way to high bring it down to 0.947 and also your pressure advance wants to be closer to 0.015-0.017. Also your volumetric speed wants to be halved to 10mm3. Set your part cooling to minimum 10% maximum of 45% overhangs around 50-75% and print at between 70-120mm, I prefer to hover around 70-80mm. The filament also doesn’t play nice with to much retraction.
I shared my settings in the my most satisfying filament post, link below the settings are near the bottom and a sample photo of a print in Esun white PETG is a few above it. Or if you want the easier option look me up on MakerWorld, same name as here. Most my stuff is Esun PETG solid white I love it 