To circle back briefly, the original avios and TPs have posted now. A big ^ to our lurkers on the BAMissingAvios handle, who proactively reached out and offered to help after I posted the original thread and before I'd even had a chance to call in myself. The process does take a few weeks, mainly it seems due to AA taking their sweet time to verify that you flew on the itinerary, but one can't pin that on BAEC.