Even CPU - X isn't showing the accurate info. Or maybe this one doesn't have the 64bit instruction set? Cause even the GSI custom roms for it are in arm instead of arm64.That is probably because of apps limitations.
There is popular app called CPU-Z which used to detect my phone processor sd 617 as sd 615.
If you want accurate results, instead use CPU-X.
It also allows you to add speed and temp notification on the status bar of your phone.
Actually these technical differences doesn't matter in real life.
If the phone meets your needs, there's nothing to worry.
There are even some 32 bit processors that are faster than entry level 64 bit processors.