Hi @Tim Hellegers ,
Thanks for using Microsoft Q&A !!
In my opinion, you could create separate ADF's for different projects as those are separate. Also, I suggest you to establish a CI/CD Pipeline for each your Project ADFs which will help you move pipelines easily from one environment(dev/prod) to another instead of using two different ADF's (ADF-DEV, ADF-PROD), one for development and one ADF for production.
Please refer to the documentation for more details. This way you will not affect pipeline of any other projects.
Please let me if this helps.
Thanks
Saurabh
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