Almost everyone who received pre-arrival in Oct and Nov are waiting for PPR (there may be few exceptions but I haven't heard from anyone lately)
I know few applicants who had to wait for up to 2 months after pre-arrival.
Pre-arrival doesn't mean its all over … it just means you have passed eligibility and there may be still some internal procedures in process.
Don't panic about it …. its very normal with NDVO.. and also, I am May applicant … have not even received pre-arrival yet.
So hang in there