Why Odin Spehere Leifthrasir PAL is not in the game compat list?...

Of course not every released game is in the list, how do you want me to guess all the games there are and their statuses currently on the emulator, what you're saying doesn't make any sense, the only games there are the ones tested and reported on the forums.

I already made a library page that lists most untested games using GameTDB PS3 database, on https://rpcs3.net/compatibility?l&f=...b&p=14 page you can find that game.

If you want the game to be added you must test it and submit a proper report for it in the adequate area. Also don't assume games marked as Nothing are games where no work has been done to make them work, this doesn't make sense, they're just games that don't work.