There shouldn't be a big problem claiming missing miles and status points for CX-marketed-and-operated flights.

Last month I helped a relative to claim missing miles for a CX flight back in September 2022. The claim showed up on transaction page like yours, and it was credited within a week, although the request was updated as "rejected".

However if you're claiming missing miles for partner or codeshared flights, it's a real nightmare. Those claims will not show up on the transaction page which you'll have no idea of the progress. CX is also very strict with the supporting documents – I had my first request rejected the next day because I didn't attach the e-ticket receipt. I thought the boarding pass was good enough to prove that I was on the flight, plus e-ticket number was clearly shown on my boarding pass. I resubmitted the claim with both the boarding pass and e-ticket receipt, and it took like 2 or 3 months before I called CX to check on the status of my claim (I was unusually patient with their 6-8 weeks processing window). The agent said they couldn't see claim history, but the miles and points were credited coincidentally shortly after the call.

Since then I've had 2 other claims for partner airline flights, which the second claim took a long time and magically cleared shortly after I called CX to ask for the status.

The third claim happened just last month. I called CX 2 days ago to see if the same magic happens, however as of this moment there's no update yet.