Let us understand this new feature released as part of 2022 Release Wave 1 with a simple example.
Here we have opened the New Activity drop-down list for an existing lead record within Dynamics 365 Sales Hub.
We can see around 15 activities listed there.
Now let us enable the feature. Navigate to
Environments > [Your Environment] > Settings > Features
Scroll down to the bottom, toggle the switch on and save the changes.
As expected now we see only 4 activities listed, that were added in the Sales Hub App appearing there.
Now let’s edit the Sales Hub app and add a new activity table e.g. letter there
Save and Publish the changes
As expected we can see Letter in the New Activity drop-down list.
Now let us open an existing contact record and check.
As expected it is the same for the contact record with the Sales Hub.
Just to confirm let us open the contact record from Dynamics 365 Customer Service Hub.
As expected it shows a different list. It doesn’t show the Letter activity as the letter was added to Sales Hub and shows Service Activity in the drop-down.
Get the details here
Hope it helps..
Nishant Rana's Weblog 
This feature is so welcome, but why they don’t apply the setting in the activity type filter field on all activity view in the same time. The new Activity dropdownlist is filter but just under it , you can see all the standard activity table … so confusing for our customer.
LikeLike
This feature is so welcome, but why they don’t apply the setting in the activity type filter field on all activity view in the same time. The new Activity dropdownlist is filter but just under it , you can see all the standard activity table … so confusing for our customer.
LikeLike