A new preprint uses 22-band JWST and HST photometry on two ~4e10 solar-mass disks in GOODS-South to map radial age and metallicity profiles at z=1. The U-shaped age profiles turn over near the star-formation edge while metallicity declines outward, implying stellar migration dominates beyond this boundary. With only two galaxies the result is suggestive rather than definitive, yet it directly tracks inside-out growth: inner 8 kpc shows little mass increase since z=1 while outer regions grew by ~300 percent. This pattern challenges standard hierarchical merging runs that underpredict outer-disk buildup at high redshift. Related work from the TNG50 simulation suite similarly finds that strong baryonic feedback is needed to suppress early central star formation and allow later outer accretion; the observed edge-defined sizes align better with those tuned models than with older Illustris runs. Limitations include the tiny sample and reliance on photometric ages that carry ~0.3 dex uncertainties. If confirmed in larger JWST surveys, the findings tighten constraints on how supernova and AGN feedback regulate angular-momentum transport across cosmic time.