Sorry for troubling you with this, but can you confirm if Sonarqube doesn’t offer PDF report in Developer subscription or it doesn’t offer any kind of repofrts at all.
Little confused as on Sonarqube pricing page is says in the Enterprise edition that there are securoty and health check reports available
Sonar’s reporting capabilities, like Security Reports all described here, allow downloading reports in various formats starting in Enterprise Edition.
None of these reports will probably offer the granularity of detail you’re looking for from a coverage report like that reported by JaCoCo (which modules/files have more coverage than others, etc.)