I'm thinking like the main reason why David de Gea couldn't find a team for himself is his high salary expectation. He couldn't reach an agreement with Manchester United because of this reason. I thought that maybe Bayern Munich would be keen on signing him but they didn't want to go for him either. They preferred a young talent named Daniel Peretz instead.
If Bayern Munich didn't spend a lot of money on Kane transfer then maybe they would have made an official offer for de Gea who knows. Because it took them even a long time to reach an agreement for Kane transfer at a price as favourable as possible.
They wouldn't have paid a lot of money for Kane's transfer, but the Tottenham president turned out to be very stubborn. Maybe they gave up on the De Gea transfer when they gave him more money than they expected. I think a goalkeeper of De Gea's quality would strengthen Bayern Munich. I think De Gea will sign with another team during the interim transfer period.