Qatar Airlines: Modifying Seat Selection

I've booked a ticket on Qatar Airlines. I can see on their website that there should be options for modifying seat selection. However, in "manage booking" page, I don't see any option for modifying seat selection. Could you let me know if I'm missing anything in the manage booking page? Where can I find the modify seat selection option?

For reference I'm attaching a screenshot of the manage booking settings options:

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Can you change seats after booking?

With Basic Economy, you'll automatically be assigned a seat before boarding, and you won't be able to change your seat once it's assigned. Advance seat assignments may be available for purchase during booking and up until check-in opens.

Can I change my seat after online check-in?

You may change your seat until one hour before the flight departs. 1.In the Flights & Services page, select "Check in now" from "International Web check-in" in the Boarding/check-in menu. 2. On the Identification screen, enter the information of the flight you want to change seats on.

Is Qatar Airways blocking middle seats?

Passengers are required to wear face masks on board, but no seats are blocked. Crew wear PPE suits, glasses and gloves.

How to select seat in Qatar Airways flight|| How to choose window seat in Qatar Airways flight

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