It's plastic and metal. It can be repaired or - if it's more practical or sensible to do so - it can be replaced. That is what insurance (either yours or the the third party's) is for.
As the solicitor confirmed, there are (thankfully) no injuries, which are sometimes not so easy to mend. It's now just a matter of time and detail.
The accident occurred on 28th October, so in near enough two weeks, you've spoken to the solicitor - who, from your earlier post, you like and seems calm enough - and you now have the full estimate back from an authorised BMW dealership; things are moving on.