Well… Interesting results.
Printing a 25x25x50mm cube with Custom G-Code: “G28 X Y” inserted every 1cm yielded very promising results. The printer seems to home very consistently as there are no “steps” in the part. There is the slightest visual layer difference when looked at it in the right light but nothing you can feel with your fingernail. There is a little bit of stringing on the back side when the nozzle comes back from the wiper.
Inserting the "Pause: “M400 U1 G28 X Y” in the slicer yielded the same results. The nozzle would wait till the user resumed the print and would then home before continuing printing.
BUT
Pausing using the screen or Handy App would not use the Pause g-code from the slicer. It would pause and resume without homing.
My take away is that Bambu will have to add it to the printer firmware.