Activated JobExecutor, but still not active/working while using MariaDB (Docker)?

[Yana]

MariaDB 10.2 is supported with 7.9.0.

Could you please try something on the non-working setup:
setup jdbcBatchProcessing configuration to false
https://docs.camunda.org/manual/7.9/user-guide/process-engine/database/#jdbc-batch-processing