Hello, I’m sapphire for OW and Gold for Star, but I’m super confused about baggage.

So if I fly ABQ (AA) - DFW (JAL) - NRT (JAL) - SIN
and book via JAL.

Base on their website because my first flight is AA does that mean I only get 2 baggage check in? I know that if booked via AA it should be 3 based Sapphire (platinum with AA). Because my first flight is domestic ABQ - DFW.

Because if I look on JAL website and sapphire for international, the allowance should be 3?

Other question is I’m assuming that Gold for Star alliance is only 2 baggage if I did ABQ- DFW- DOH - SIN for qatar airlines?

Really appreciate your input