It looks like you haven't been given the appropriate Target permissions - with the correct permissions you would see Target as an option in that Quick Access section. You would need to speak to your Experience Cloud system/product admin to get permissions for Target added to your user

If you navigate to https://experience.adobe.com/ and log in then you should see Target as one of the options, if you have been given the relevant access permissions

Could you give an example of what user.get('pas_modelOfInterest_test') returns and an example value for the  "actionWeightage" mbox parameter ?

What are you using to submit the API request? i.e., is it submitted via something like Postman or a CURL request?  

Just to be sure I understand correctly, is your goal to control area 1&3 with feed 1 and area 2 with feed 2? 

Perhaps this API doc would be useful, if you haven't seen it already; it includes all the details around how to structure the API request/file contents etc

It's the same idea as this serverState example, with a hybrid implementation, where you have the option to pre-fetch and cache many different offers/activities. That means you can then render them from the cache instead of having to make another network request to Target. 

Essentially "target-global-mbox" is reserved, so you can't use it as a "named" mbox in the requests you're making. You should be able to use any other values for the names of your mboxes though. 

Yes, you can contact Customer Care at customercare@adobe.com There’s more info here about what details to include etc:https://experienceleague.adobe.com/docs/target/using/cmp-resources-and-contact-information.html?lang=en

I've had confirmation this is a known bug, reported last week; a solution is being worked on currently but I don't have a date on when the fix will be deployed yet