Samsung Galaxy A04 (SM-A045X) , the "best" custom ROM depends on whether you want a stock Google experience or deep customization. Because the A04 is a budget device, most stable options are unofficial builds or GSIs (Generic System Images) found on SourceForge XDA Developers Top Custom ROM Recommendations
Search XDA Developers Forum for [ROM][GSI][A04] or check Telegram groups: "Samsung A04 Customization." samsung a04 custom rom best
She went back to the XDA thread and posted: Samsung Galaxy A04 (SM-A045X) , the "best" custom