Hi there. There's currently an issue where the Corrupted Omelette Triumph is unlocking before you've destroyed all 40 Eggs. In your case, you are still missing one Egg located in the Keep of Honed Edges Ascendant Challenge.
https://www.d2checklist.com/2/4611686018466468968/checklist
Once you destroy this last Egg, the Sparrow will become available in your Collections under Equipment > Sparrows > Season 4.
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Ok thank you so much !