Hello @J J ,
Welcome to the Microsoft Q&A platform.
It’s a hard limit, it cannot be increased.
Currently, you can send the Activity log from any single subscription to up to five workspaces.
A single diagnostic setting can define no more than one of each of the destinations. If you want to send data to more than one of a particular destination type (for example, two different Log Analytics workspaces), then create multiple settings. Each resource can have up to 5 diagnostic settings.
I would suggest you to provide feedback on the same:
https://feedback.azure.com/forums/231545-diagnostics-and-monitoring
All of the feedback you share in these forums will be monitored and reviewed by the Microsoft engineering teams responsible for building Azure.
Hope this helps. Do let us know if you any further queries.
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