Hello Johan,
Thanks for your question.
Yes it is possible to allocate resources to multiple container apps.
You simply need to navigate to the configuration of each app you want to associate with the Dedicated plan.
See reference: https://learn.microsoft.com/en-us/azure/container-apps/plans
https://learn.microsoft.com/en-us/azure/container-apps/workload-profiles-overview
Regards,
Abiola
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