This is the most critical step. Check the official realme community
As of my latest knowledge (early to mid-2024), the is an entry-level device powered by the Unisoc T612 (also known as Tiger T612) chipset. This is a crucial point because Unisoc chips have very limited custom development compared to Qualcomm or MediaTek. realme c30 custom rom
'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 is the most critical step