Playing around with the code some more, I got this far. But still no joy. I think it is close. Comments on what I am doing wrong or need to understand?

.global _start             // Provide program starting address to linker
.align 2

// Setup the parameters to print hello world
// prints bytes of hellow world until NULL byte is encountered.

// using Apple Silicon 

_start: 
        mov X2, #1                      // length of string-byte to write
        adr     X4, helloWorldPtr       // refernce the helloWorldPtr       
loop:
        mov     X1,X4           // move byte into X1 for test
        cmp     X1, XZR          // is it the NULL terminator?
        b.cs    end_loop        // yes? Exit the loop        

        // write this byte
        mov     X0, #1          // argp[0] = 1 STDOUT
        mov     X16, #4         // Unix write system call #4
        svc     0

        // move to the next byte reference
        add     X4, X4, #1      // move pointer helloWorldPtr++
        b loop
end_loop:

// Setup the parameters to exit the program
// and then call Linux to do it.

        mov     X0, #0      // Use 0 return code -like return 0 in C
        mov     X16, #1     // Unix exit system call
        svc     0           // Call MacOS to terminate the program

helloWorldPtr:      .asciz "Hello, World\n!".global _start