Installing a Custom ROM on a Samsung device differs significantly from other manufacturers (like Xiaomi or OnePlus).
While dedicated device-specific ROMs (like LineageOS or Evolution X) are sometimes ported, many A04s users have success with . Pixel Experience: For that clean Google look. LineageOS: For ultimate stability and privacy. samsung a04s custom rom
While there are few "dedicated" ROMs like official LineageOS for this specific model, you can install various GSIs to get a clean Android experience: LineageOS GSI Installing a Custom ROM on a Samsung device