How to buy a weekly ticket for Munich public transport?

How to buy a weekly ticket for Munich public transport? - Faceless woman buying metro ticket via electronic machine

I often travel to Munich and figured it would be more cost effective to get a weekly ticket. The official website mentions you can do so at most ticket machines by purchasing a ticket called the IsarCard. However when I enter my destinations on the ticket machine, I'm only offered to buy single tickets or strip tickets. So my questions are:

How do I get the MVV ticket machines to sell me a weekly ticket?
Can I also do so on the DB Navigator app somehow?

public-transport munich

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How to buy a weekly ticket for Munich public transport? - Focused Asian couple buying ticket on station

How to buy a weekly ticket for Munich public transport? - Back view of unrecognizable ethnic female manager with short dyed hair in elegant suit buying ticket with electronic machine in subway station

How to buy a weekly ticket for Munich public transport? - Young African American woman touching screen of ticket machine in metro station

How To Buy Tickets and Navigate Germany's Public Transportation | Munich, Germany

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