You can deploy workbooks from ARM templates, this may be of use if you’ve not stumbled across it already:
example ARM template: https://github.com/microsoft/Application-Insights-Workbooks/blob/master/Documentation/ARM-template-for-creating-workbook-template
Further info:
Alternatively there’s quite a lot of already made workbooks out there in the Azure Monitor workbook repository for you to use or customise for your needs:
https://github.com/microsoft/Application-Insights-Workbooks/tree/master/Workbooks