Hello,
Support for the build-wrapper by ARM was introduced in SonarQube starting from version 10.2.
Your version is also past EOL. You should upgrade to either the latest version or the current LTA (long-term active version) at your earliest convenience. Your upgrade path is:
9.9 → 2025.1.3-> 2025.3.1 (last step optional)
You may find these resources helpful:
Once upgraded, the build wrapper should work for arm64! You can also, at that point, decide to stop using the build wrapper entirely and use AutoConfig.