Itch.io games in collection not shown in Lutris

I have a game on my itch.io account in collection, it’s free game, not purchased, therefore it’s not present in my itch.io library.

I learned from the 2 links below that only purchased games get into library, however users can add free games to “collections” which appear in itch.io library but are not themself in library like purchased games:

https://itch.io/t/822612/how-do-i-add-this-game-to-my-library
https://itch.io/t/808186/how-i-can-add-new-games-to-my-library-and-make-new-collections

Version of Lutris I use is 0.5.17, I’ve connected to my itch.io account in Lutris however no games are shown in Lutris.
According to the link below this is likely due to that only purchased games are shown but not games in collection:

  1. Can somebody confirm only purchased games are shown in Lutris or is it misconfiguration on my part?
  2. Can somebody tell if this pull request above is part of Lutris 0.5.17? in which case I should see games in collections.

I have unchecked “Installed Games Only” to show all games in Lutris options.

I’ve got about a dozen things I bought on Itch, and only 2 of those show up in Lutris.
I wasn’t too worried as they are a mix of C64, Windows, Amiga and other things, and I normally just download them to my bucket of “stuff.”
From people’s experiences then, I’d have to guess there’s either a flag needed on the item in Itch, or a logic bug in Lutris.

Edit: Only real difference I can see returned from the API is that the titles that load have “p_windows” in the traits tag - and Lutris wants to install them using WINE, (even though one is a C64 disk image.)