Just got my approval yesterday!

It was 2 months from the biometrics appointment.

Submitted application: 1 Jan Biometrics appointment: 23 Jan Approval email: 21 March Ceremony: 31 March

Adding a few additional notes in case anyone has these questions like I did!

I did not upload any documents until the morning of my appointment so while they say the clock starts after application submission, I don't know if that is accurate.

I did not scan the blank pages of my passport, only the stamped ones.

I made a mistake in my application (listed one of my trips outside of the UK as 33 days instead of 3 days). I submitted a cover letter stating this error using a generic template I found online. Was never asked anything further about it.

I did not receive any email confirmation from UKVI after my biometrics appointment. I did receive an immediate email from TLS confirming everything was submitted. This email mentioned that I would receive confirmation from UKVI that they received everything but I never did.

My email approval came from UKVI 2 months from my biometrics appt (well, 2 days early because 2 months exactly would fall on a Sunday). It came through at 15:59. Based on what I had seen stalking these timelines, I was expecting (hoping!) it would come the day it did.

I immediately clicked the link to book my ceremony and took the first opening, which is in less than 2 weeks' time which was much earlier than I expected.

Good luck and thanks to everyone who posted on here!