The pre-op people are usually nursing staff just going through a list to rule out issues that might cause a problem in surgery etc; they usually won’t know the details of any surgical procedure themselves, but ideally you should have had at least one consultation with ENT before being listed for sinus surgery where they could have gone through the details.
But I’m very aware that often these days it’s something that can get brought up at the end of a consultation eg we could book you in for surgery on your sinuses which might help if you’d like us to do that? And if you say yes you might assume that at some point someone will explain a bit more about the details of it to you and I do think prepandemic if you were waiting 2 years for it that would have happened, but I agree that doesn’t always happen these days ahead of time. I was listed for gallbladder surgery after being admitted for a gallstone complication, so never actually got to speak to a surgeon at all until the day of the procedure. Fortunately with my medical background I basically knew what to expect!
You will get a basic explanation of the procedure tomorrow from the surgeon who will come and see you beforehand to consent you for the operation and make sure you’re happy to go ahead. But I appreciate many people would prefer to have that info ahead of time!