IBM MQ has a developer edition that runs on Linux (Ubuntu or Raspberry Pi) on ARM64 (64-bit ARM):
https://ibm.biz/mqdevrpi
For an explanation and tutorial of Linux on ARM64, please read the following
https://developer.ibm.com/tutorials/mq-connect-app-queue-manager-arm64/
IBM now needs to create a developer edition of IBM MQ that runs on Windows on ARM64.
Regards,
Roger Lacroix
Capitalware Inc.