New to EF (purchased premium membership yesterday).

I am trying to find partner award availability for Swiss and I’m a bit confused. I believe this would be I class.

EF does not show I0 as I’d expect, it simply does not mention I class at all in the list of seats. Is this standard?

I tried to investigate more, and I cannot get it to show I availability even for flights that are bookable. LX LAX-ZRH on Feb 6, for example is bookable on UA and Aeroplan, but EF does not mention I fare bucket. It just lists: F7 A7J9 C9 D9 Z9 P9 G9 E9 N9 Y9 B9M9 U9 H9 Q9 V9 W9 S9T9 L9 K9

I’m just a little confused. I guess my questions are:

1.) in general does EF show a zero for no no availability (e.g. “Y0”) or is the fare class removed entirely from the list?

2.) for this case specifically, why can’t I get EF to show a single I seat on LX, even when I know one is available?