Here is the soltuion:
First unlearn how you did it in BIM 360 ..., it does not work like that in ACC.
Masterplan Model:
In Revit, open the model.
Click Collaborate tab, Manage Collaboration panel, Collaborate.
If prompted, sign into your Autodesk account.
In the Collaborate dialog, select In the cloud. Click OK. Select the desired project folder. In the dialog, click Initiate. Click Close to continue.
Architecture Model (local linked model):
In Revit, open the model.
Click Collaborate tab, Manage Collaboration panel, Collaborate.
If prompted, sign into your Autodesk account.
In the Collaborate dialog, select In the cloud. Click OK. Select the desired project folder. In the dialog, click Initiate. Click Close to continue.
Architecture Model linked to Masterplan Model in ACC:
Open the host model (workshared cloud model)
Click Manage tab, Manage Project panel, Manage Links.
On the Revit tab of the Manage Links dialog do the following:
Select a linked model in the cloud and click Reload From. Notice that the file browser opens by default to the cloud project location.
Select the name of the linked file, and click Open. The cloud version of the link is cached on your local computer and loaded. Note that local links won't be visible when published. They must first be migrated from local links to a cloud model link. Click OK to close the Manage Links dialog.
Sheets:
Make A0 Revit Sheets with different Floor Plans, Sections and 3D Views. The sheets show up in ACC.
Publish:
COLLABORATE, MANAGE MODELS, MANAGE CLOUD MODELS, PUBLISH SETTINGS, LATEST VERSION PUBLISHED, the Icon has a green checkmark.
COLLABORATE, SYNCHRONIZE WITH THE CENTRAL, SYNCHRONIZE NOW.
If it is not yet linked, go back to:COLLABORATE, MANAGE MODELS, MANAGE CLOUD MODELS, click on the icon PUBLISH LATEST