's chipset has more limited development support. You generally won't find a vast list of device-specific ROMs like those available for the Realme C3 .
This happens if you flashed a ROM built from an older vendor tree. Go back to OrangeFox, wipe "Persist" partition, and re-flash the ROM. Note: Wiping persist may break widevine L1.
There are currently no major official custom ROMs (like LineageOS or Pixel Experience) specifically maintained for the Realme C30