Well, this is strange and might be some fake or sort of 'patch/rename' by BIOS.
CPUID says "AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx ", but this name can be changed by BIOS or applications.
HWiNFO is not fooled by this and instead reads the CPU name from internal fixed registers, which says: "AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx "
Thus I believe what HWiNFO is showing is correct.