if Munich increases the bid, it is possible that Tottenham will reconsider. Going to MU is also a rumor, but the problem is that Tottenham has paid a high enough fee for Kane. and MU also experienced problems with negotiating prices with Tottenham.
Kne had to negotiate with the club to lower his price if he wanted to move to the club Kane really wanted. including if negotiations with Munich go well.
Things change if Kane takes a stand against Tottenham. If Kane says he wants to leave the team, Totenham won't be able to keep him any longer. However, as far as I have observed, Kane is loyal to Tottenham. He is not crushing Tottenham, where he played football for years, to make a deal with a new club. Therefore, although there are many teams that want to transfer him, things are progressing very slowly.
Tottenham may prefer to sell him to any country team in Europe rather than lose him to Manchester United. This could be Bundesliga champion Bayern Munich or Real Madrid from Spain. If he goes to either of these two teams, they won't get as much reaction as Manchester United. There are serious amounts of talk about the transfer fee. A star player like Harry Kane could not be transferred cheaply.
I have similar ideas about this potential transfer. He is already a Tottenham legend in England. If he plays for Manchester United, there will be some deviations in his career. I think Germany and Spain are a better option for him.