As of July 7, 2024 the Gutenprint project has formally deprecated MacOS support. This means that no further MacOS-compatible binaries will be produced.
Gutenprint has not had an active MacOS maintainer for over three years, and the remaining developers lack the technical ability to produce MacOS binaries, much less undertake the substantial amount of work necessary to produce, test, and support binaries on newer (post-Mojave/10.14) MacOS releases.
It seems like the better option would have been to fix whatever was blocking them just two years ago, rather than this wild rube goldberg machine of a Linux VM emulated in a browser tab.