Understanding flyback transformer datasheet
It seems that it is actually based on a &quot;typical&quot; application, as you stated.
Searching this in WE site, these results came out:
https://www.we-online.com/catalog/en/search?search=750343140
The first one implies that this transformer (750343140) is a &quot;MID-OLTI Offline Flyback Transformer for Texas Instruments&quot;.
By clicking on the second result, we see a demoboard (TIDA-00708) description. It implements a flyback converter using the TI's UCC28881 device. On the bottom of the page the 750343140 is referred as a product.
In the demoboards datasheet we see a transformer named 750343140R00 (there is an extra suffix). The layout of the transformer in the pg.1 is the same as the 750343140 layout.
The key system specifications are almost exactly the same as those referred on the schematic:

In the 2nd table (pg.6) though, it states that the Fmax (Desired switching frequency) is a little higher, at 62kHz (not 52kHz as in the schematic).
To conclude, it seems that these values on the schematic refer to a specific flyback application and that they are (probably) the dc values of operation.