Thanks, I do see the SQ business for SIN-IST, and there are plenty of flights IST-CDG. Searches done through AP website.
However, I assume it is normal for me to not be able to search SIN-IST-CDG as a multi city award on AP?
Thanks for the other suggestions, I will look into them.
Another Q, is there a known way to avoid the YQ from CDG -> YYZ on the way home? I can only find AC flights for this segment. Connecting through FRA does not show any award space on lufthansa on any date for FRA-YYZ.