Most likely, your application has been put on hold. With regards to the admissions timeline, I am pretty much in the same boat as you, albeit I have completed everything that I can for now for my Imperial application, just waiting on my decision now.
I applied on the 27th of September (I applied to Cambridge so had to get my application off before 16th October. Also applied to Durham, Edinburgh and Manchester), did my admissions test for Imperial on 12/10 and had my interview on 29/11. There is one more interview day for 2023 on 13th (or 14th) of December and after that, all interviews will be conducted in the new year. If you haven't heard back re interviews, I don't think you will get it in 2023 and most likely will pass on to the new year.
Don't get too stressed because if you get rejected (not that I am saying you will), all that anticipation was for nothing. You will feel disheartened and lose the will to do any work (speaking from experience after my Cambridge rejection). You will think that you put in all of that hard work in vain and that you will get nothing from it. I know you are worried and I was too for my Cambridge decision but trust me, worrying will only make the rejection worse if that is the case. You will not realise that you are applying to one of the most competitive courses in the country and that rejection is a possibility if you worry - it will impact you negatively and you will lose the will to do any work. You may already be behind on work and the thought of being rejected from your "dream university" will only make you get further behind (again, speaking from experience).
If you don't mind me asking, what sort of things did you have on your application (super curricular stuff etc.)? Do you have anything that you think will be of interest to the admissions tutors and perhaps make you stand out from the competitive crowd?
What are your grades like GCSEs and A levels-wise?