It seems like this news might be true, Fenerbahçe president Ali Koç and Hakan Çalhanoğlu reportedly had a phone call and Ali Koç asked about the conditions for a potential transfer.
In the news I read today, Hakan allegedly told Ali Koç:
"We spoke with Galatasaray for a month and a half. Every morning we wake up to Osimhen, every night we go to bed with Osimhen. They pushed me into the background. Even if they try to step in now, I’ll stand firm and come to Fenerbahçe."
So, there's a real possibility that Hakan Çalhanoğlu could join Fenerbahçe.
As for Galatasaray, Osimhen clearly seems more important to Galatasaray and in my opinion, they’re doing the right thing by waiting for him.
This is good news for us then but I hope we can convince Inter to drop to a more feasible level when it comes to the transfer fee. I don't think Hakan Çalhanoğlu is worth giving €30m at this age.

I understand Galatasaray's concern on Osimhen. He won the league for them last season. Now they have finally finished the deal successfully.
Hakan Çalhanoğlu's arrival at Fenerbahçe would be great news for Fenerbahçe. But why would Hakan want to come here? He's still a player who could play for many clubs in Europe, so if he were to agree to join Fenerbahçe, it would be one of the worst decisions he could make for his career. He could play in Italy for at least another two or three years.
If he came to Türkiye at 35, every team would want to sign him anyway. I think he should earn a little more money and continue playing internationally
Normally I wouldn't expect him to come to Turkey yet. But because of some internal problems at Inter he decided to sign for a Turkish team. I hope Fenerbahçe manages to get him.