Something I find really amusing about CCSakura lore (as messy as CLAMP can be with consistency) is how Touya and Syaoran both have in common the fact that they inadvertently fucked over Clow's predictions and are now crucially inserted in whatever goes on whether they want it or not, having both insane unpredictable magic.
Touya derailed Clow's plans possibly just by being born and that he didn't consider that Fujitaka could have two kids. Him just existing and finding Yukito already changed everything. Yukito's independent nature from Yue's memories, born from the need of him to ignore his given purpose until the right time, gave him a clean slate of freedom of choice which he used to stick to Touya instead of Sakura, as Clow had considered would happen. Yukito fell for him without even knowing that he or Touya had magic. Then Touya gave Yue his magic, while acknowledging Yue as a different entity separate from Yukito but equally as valid and worthy of being saved, and as much as Yue cares deeply about Sakura, you can't convince me that magic gift in itself wasn't something that finally pushed him to start moving past his grief for Clow once and for all, especially at a time they knew for a fact that Clow was somehow lingering, because his magic was showing up.
Not only that but Touya ended up having even more magic, independent from Clow's own, and is one of the incredibly few people in existence who can control time magic and when asked by Kero, Spinel and Ruby Moon wtf is up with that he goes like 'what, like it's hard?'.
Then Syaoran, after losing his right over the cards, just decides to stick around, risking his life persistently to save and assist Sakura, and instead of feeling a sense of competition forever because of his bloodline and what he was taught to feel entitled to due to his upbringing, he just decides he'll give her whatever he can to help her if she asks, because he loves her. And Sakura also falls in love with him. And the cards become attached to Syaoran because Sakura is attached to him and their magic intermingles in a way in which not only she can lend him cards, they tag along with him out of their own free will without Sakura even knowing because they care for him too, out of Sakura's love and out of their own choice because hey, this kid is good.
And Syaoran develops his magic as a separate form from Clow's and it becomes powerful enough to break through insane powerful magical barriers to reach Sakura when she's in danger.
And neither of them really knew what the fuck they were actually getting into in the first place, because one was just vibing with a guy he met at school and the other one was sent at age 10 by his family to pick some cards in a foreign country and now they're magical beacons forever attached to Clow's legacy.
