Hi. I posted Nomad Job Launches UI empty / no history of periodic jobs - #2 by Kamilcuk about it.
Basically execute nomad operator api /v1/event/stream > file in the background and then parse the file with some python script. Such event stream will give you all the information, and if some information is missing, you can detect that situation and send an alert. For an example stack, Grafana Loki has a absent_over_time operator and support for json parsing and Grafana can send alerts based on Grafana Loki.