Hi,
In the exact same boat. I posted my application & my daughter’s & received 1 text.
Yes, regret doing it by post as well. I’ve had had 4 family members / friends apply a lot later than me & all already have their passports after applying online.
You will likely finally get an e-mail saying they have received your application at X office on X date & it’s awaiting to be checked.
I am currently awaiting a call back from the Progress Team. More chance of getting a call back from the Pope.
Sigh.