Use the Odin tool on a Windows PC to flash the recovery.tar file to the AP slot.
The Galaxy A50s (SM-A507FN/DS) has a dedicated developer community on platforms like XDA Developers. Here are the most stable options currently available: Galaxy A50s Custom Rom
This is the gold standard for those who want their Samsung to feel like a Google Pixel. It includes all Pixel wallpapers, fonts, and the iconic "Material You" accenting. It is highly stable and passes Google’s SafetyNet out of the box, meaning banking apps usually work without extra tweaks. Use the Odin tool on a Windows PC to flash the recovery
The successor to CyanogenMod, LineageOS focuses on stability and security. It is a "bare-bones" ROM, meaning it doesn't come with Google apps pre-installed. This makes it the best choice for users who want to "de-Google" their lives or customize their system from the ground up. It includes all Pixel wallpapers, fonts, and the
You must install a tool like TWRP (Team Win Recovery Project) or OrangeFox Recovery to "flash" the ROM files.