@snoopy , The deployment of the newest release will be finished soon but there is no ETA on the exact date. I understand you are looking for 9.0.74 version, the Tomcat 9.0.83 will available in the Java Web Server version dropdown soon, however, based on your requirement if you select the auto-update version now, most regions will use Tomcat 9.0.83 today.
Edit:
However, for Tomcat 9.0.74 version, it is recommended to leverage custom container and then choose your tomcat version: Run a custom container in Azure
Kindly be assured that I have relayed the feedback to our product engineering team.
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