Request GCMS notes immediately from IRCC and CBSA. I can feel your pain, my Eligibility is also Review Required since Nov 17. I am AOR Oct 4, so yours is way much stressful and painful. After that nobody has touched my file. My Eligibility requires review because I didn’t submit one reference letter from a foreign employer at the time of submission and the letter from Canadian employer was signed digitally (Named digital signature in Adobe). Although I submitted the missing reference letter in Nov 2021 and a new hand signed letter in Feb 2022, nothing has happened on my file so far. That’s why I ask that you should request GCMS notes to see why they require a review on your eligibility.