I must apologize for using the words " never work in crome book "
That kind of language is actualy a bit imoral in my opinion, or at least not very helpfull.
Where there is a will there is a way is a better attitude!

gcodeSender looks a bit promising because it streems gcode.
some things that might need to be done....

- slicers typicaly output gcode containing instructions for where they want our laser dot to hit the resin, not for the deflection at which to position a mirror so that our laser dot will hit the resin. this is part of the translation work that the peachy printer software dose. So.... perhaps the peachy software could be modified to output deflection g codes and you could send that file with gcodeSender.

- if gcode sender works by just alwase keeping the serial buffer full, ( blocking mode) then the circuit could run a
modified firm ware that only reads serial data relevant to the number of drips it has counted.
essentially what this dose is make drops of water regulate the flow of data over the usb cable.

If you have the skills to make it work then we will gladly help.

That said you might also just prefer a different version of the circuit ( that is still in developemt )
that will have and SD card slot so you can put many prints( gcode files) on to your printer, and it will just need 5 volts for the duration of the print.
That 5 volts could come from your chrome book.
The version in the update cant do this because it is a supper basic version and so it has VERY little memory on board.