I never doubt the quality of Kyle Walker, but I don't think Bayern Munich will sign him. If they transfer, it would be a good challenge for Walker, of course. I think he will go to Saudi Arabia to earn money because a 33-year-old football player will want to earn serious money in his last days.
It is impossible for Bayern Munich to want to bring in Kyle Walker without having something special that this 33-year-old player has. Kyle Walker is still very much needed by Guardiola to guard the defense of Manchester City, he has a very strong vision of playing, as a player who plays at right back he has produced 49 assists in 500 matches in the premier league.
Kyle Walker is also a player who can play in different positions, apart from being reliable in his natural position (right back) he can also play in the centre-back position, he was often used by Guardiola in the right wing-back position when Manchester City needed his speed. Maybe because he has the vision of playing like Philip Lahm, Bayern Munich really want to sign him, but Manchester City are not ready to part with him because Guardiola really needs Walker's presence in his squad.