Something changed and the printer cannot be found by CUPS. I did not do a deep dive to figure out why or how it happened but purging ippusbxd from the system allowed the printer to be properly found by CUPS and the process using the ULD drivers works as expected
I simply ran
sudo apt purge ippusbxd
removed any pre-existing instance of a Lase10x printer, and followed the install steps described by Dimitrios
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