Lookman was really rumoured with Galatasaray and Fenerbahçe on the recent days. But they both went for a really late move and it was the deadline for European tournaments registration.
The transfer window was also about to close for Serie A teams so that must be why Atalanta wasn't also keen on letting him go. They wouldn't have been able to find a replacement while there were only hours left...
Staying at Atalanta is still not good for him in the long term though. I don't believe in Juric at all.
I would say that Ademola Lookman has literally been unlucky with the transfer window this summer because first he was linked to Inter Milan, then Spurs, Bayern Munich, Arsenal and no one was successful. Staying at Atalanta is the only option at this moment and I doubt if he will be happy playing for the club for the rest of the period.
If Ademola lookman will be patient enough and continue playing a good game in Atalanta he could be link with a more preferably club when the next transfer opens next year, Lookman is a good striker i have watch him score good goals in his club won the best player in Africa he should keep playing well to still keep his value so he can attracted other top club to sign him next season or next year when the window will be open again.