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What Poluweh555 said is true. When he means comfort zone doesn't mean Tottenham, he means England which you just said that British is Kane's comfort zone. Which means you guys are on the same page.
Kane in his early days in Tottenham 2014/2015 when he was the highest goal scorer, I could remember that Real Madrid gave him an offer but he turned it down saying that he is cool playing I'm Tottenham. But presently,I don't think that Kane is cool anymore because players that he is better than is scoring goals have lifted up one or two European league trophies but he is still there with no European trophy. He needs to move to Bayern Munich so that he can taste UCL and feel the joy in lifting such trophy.
Now the problem is not Kane, but I don't think Tottenham want to let him go for 100 million euros to Bayern Munich at all. If Kane really wants to leave Totteham then he might be able to force his move at all ways. But we know that Kane has great loyalty to Tottenham so he has stayed until now.
Of course Kane has the chance to win the Champions League title with Bayern Munich, but still that is not a guarantee that he will win it. Kane could also move to another Premier League team if he wants to win the title, but Tottenham are adamant with the high demand for his value.