I know its very tough and the feeling when you are facing a complete brick wall. CIC is like that wall - and we all keep wailing to it - with no response. I guess, we all should prioritize - progress of our Spousal PR first and foremost. TRV is becoming a distraction and hassle.
Ok so you applied on Dec 21 2022 and got AOR in Feb 2023 - and no response since then? Based on what I saw on this forum, yes it feels little alarming as Jan'23 applicants are getting their PPRs by now - not all, but i have seen couple on this forum. On the other hand, there are also Sep 2022 and June 2022 applicants who got their PPRs by now. So technically, its not a red flag unless it has crossed the 12-14 month timeline from the date of your application submission. You mentioned its been stuck on Eligibility for months. Did the sponsor provide all their relevant Financial and Taxes details properly and thoroughly? Did you both provided security and background checks? Has the sponsor or PA lived/worked in different countries in the past 4-5 years. Security checks take long time, specially if its from Middle eastern countries, i have been through that personally, so i know.
So in all this, what can you do? Realistically speaking - NOTHING! Even if you discover that you missed a form, how can you provide it? They dont give a link (im not much aware of the webform, does it have upload buttons? i dont know). I'd suggest check out youtube channel 'Hit and Submit'. Go through his videos to see if you missed anything. if not - then be at peace that it will take its due course. or as we say, khair inshaAllah. It will be fine.
Yes GCMS notes and trying to get something out from an MP might help - but again, if there is something lacking in the application, CIC will contact you to provide it. And you can't pre-emptively provide it, if you can, pls do it! Instead, if you are the PA and currently not working or studying, i'd strongly suggest you to you upgrade/advance your IT skills with some certifications, get IELTS done and basically everything you can to prepare yourself for your life in Canada. Put the TRV thought on the shelf for a little while. In your case, the time is pretty close for PPR. You never know, all those things might come all at once. CIC does not follow any pattern or standard way of doing things. I hope and wish that you hear from IRCC soon and get your SA, COPR and PPR ---all at once this month.
....and you never know, you might just the TRV email in few days!