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.