ARMv8 processors from RealTek do not contain ARMv7 compatibility mode (perhaps due to space or power limitations)
That said, ARMv8 is not upward compatible from ARMv7 packages on either Synology or QNAP.
If I may direct you to the ongoing Alpha test for the ARMv8 processors.
I suggest you read fully and also skim the discussion in the companion discussion thread.
