If you have 2 hrs to spare, take your phone and constantly ring them. You will eventually get through. I am speaking from experience. It took me over 2hrs before I managed to get through.
If you prefer the webchat, you might want to start refreshing the page at 8:59. Went through a couple of time but unfortunately I was at work and couldn't keep up with my phone.
My journey so far:
Frustratingly no update since 25 Feb - and my estimated issue date has passed. Cannot get through by phone or webchat

.... and I *really* need a passport at the moment!
Online application: 31 Jan 2022
Documents posted: 17 Feb 2022
Documents delivered: 17 Feb 2022
Documents received: 25 Feb 2022
Status changed to processing (verifying documents): 25 Feb 2022
Status changed to processing: 25 Feb 2022 .... with an estimate issue of 6 May 2022
Status changed to printing:
Status changed to dispatched:
Status changed to passport card being printed:
Status changed to passport card dispatched:
Estimated issue date:
My application was made after being added to the Foreign Births Register.
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