Journey alert based notification

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Hello Experts,

I have created a action based journey that triggers in case of any assignment update action. Sending alert based task notification for task assign. Here I have few questions,

1. For any assignment action journey is assigned to the person and I can see FYI notification in worklist. But for End Temporary assignment/End Assignment, I can see journey is assigned but no notification. My question is why no notification triggers in case of Ending assignment though journey is triggered?
2. I can see there is Access the Task link in seeded alert notification. I am trying to create my custom template but not able to insert that Access the Task link. I am trying to copy it from seeded template but in custom notification it is coming as a plain text only, not as a link. How to insert that link in custom template?