UNIVERSAL JJK
Yes universal jjk is valid via multiple things but I will give one for now (feel free to comment contentions and debate them)
Stabilization Feats: *"This is a type of feat where a character's existence, energy, presence, or any given factor from them sustains a structure on any given scale. And through their sustenance, their statistics are subsequently tiered to being at the level of power that is relative to the given scale of the structure they sustain."*
(Definition from VSBW)
The object being stabilized by Yorozu is the Perfect Sphere.
By statments, it possesses an absolute zero-area contact point (A = 0).
When this sphere makes contact with any matter the physics of material interactions dictate that it experiences stress, formulated as: Stress= Force/Area
Even if the physical force (F) involved is entirely finite, dividing any finite force by an area of absolute zero (A = 0) results in infinite stress concentrated entirely on the sphere's tip at the exact moment of impact.
Since the sphere doesn't defrom on impact we can conclude it has Infinite structural integrity and the structure is being actively stabilized against infinite physical stress by Yorozu's own effort, meaning she scales to her own technique.
Calamity tiers obv upscale from this