execute some codes in heap memory

Can I execute some code(asm -> hex) in the heap memory?
The x86 architecture was successful, but armv8 failed. (tested on Android os)
Is it because the code is not designed to run in the heap area in the ARM cpu?

thanks for reading

test code

usinged char prefix[] = { 0xE0,0x01,0x80,0x42,0xc0,0x03,0x5F,0xD6}; // ARMv8 asm code
char *func = (char *)mmap(0, 8, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1,0);
memcpy (func, prefix, sizeof(prefix));
int result = ((int (*)(void))test_function)();
return result;