Updated, my wife’s timeline for her first UK passport (Overseas application):
Passport printed 5:31am on 12 June 2023
Application approved 2:15pm on 9 June 2023
Documents received 10:26am on 30 May 2023
Application received 8:18am on 16 May 2023
Identity details received 8:17am on 16 May 2023
Email sent to person confirming your identity 9:46am on 15 May 2023
Email sent to person confirming your identity 9:26am on 15 May 2023
Ask someone to confirm your identity 8:28am on 15 May 2023
Application submitted 8:28am on 15 May 2023
Just waiting for DHL to deliver it.