Your machine appears to be using negative workspace coordinates, which is normal for some reason on CNC setups, but not with laser setups. You can either use a workspace offset to shift the origin so the workspace is positive, or there’s a flag in GRBL (when compiling it) to make it not apply negative workspace.
This will explain the workspace offset: https://github.com/LightBurnSoftware/Documentation/blob/master/CommonGrblSetups.md
And here is info on the negative coordinates change: https://github.com/grbl/grbl/wiki/Frequently-Asked-Questions#why-is-grbl-in-all-negative-coordinates-after-homing-or-it-so-annoying-and-not-what-im-used-to