I also read from the same report, namely Fabrizio Romano. he reported several tweets, which suggested that Alonso would stay with Bayer Leverkusen. quote that a few hours ago, Xabi Alonso had a good meeting with Bayer Leverkusen and told them that he will stay and remain at the club. which means Alonso won't be going anywhere next summer, whether it's to Bayern Munich or Liverpool. Alonso remains with Leverkusen, he even said that this is not the time to decide his future, he wants to develop at Bayer Leverkusen.
If this report happens to be legit, then this is a very nice decision made by Alonso, being in haste to leave Bayern Leverkusen after building such a formidable team wouldn't make sense, at least he should spend one or two more seasons with the club because going to another club after the season ends, he would have to start building a team with that new club and this isn't something easy to because you need to master things with the new club, even sometimes it might even take a couple of years before some coaches gets to understand things with their new clubs, and if it happens to be an impatient club like that of Chelsea who don't normally have patient with their manager, he will be sacked almost immediately if there are no results with the team.
Big teams like Bayern or Liverpool certainly apply high standards to their managers, where management will always demand Xabi to provide trophies every season. Xabi certainly understands this well, so staying at Leverkusen for another season or two could give him a better experience. Apart from that, next season Xabi and his fleet will play in the Champions League, which will certainly give him a better experience.
It's true, if Xabi decides to leave for another club, of course he needs time to adapt, Xabi is required to adjust his strategy and build chemistry with his new squad. At Laverkusen everything has been formed, Xabi only needs to add depth to the squad for next season, and no longer needs a lot of time to prepare everything.
The news that Xabi will stay next season with Leverkusen seems to be official, especially if Fabrizio Romano has indicated it. However, what is clear is that next season will be more difficult to navigate than this season, where the unbeaten record they created this season will be very difficult for them to surpass. Apart from that, Bayern will certainly improve their squad so they can dominate the Bundesliga again.