This is a new thing I noticed while looking at 2023-2024 Common Data Sets for the few schools which have published them so far.
https://www.amherst.edu/system/files/C.%20First-Time%2C%20First-Year%20Admission%20V2.pdf
https://www.wellesley.edu/sites/default/files/assets/departments/instresearch/files/cds_2023-2024_-_final.pdf
https://www.hmc.edu/institutional-research/wp-content/uploads/sites/42/2024/01/CDS_2023-2024_Complete.pdf
"If available, please provide residency breakdowns for total applicants, admits, and enrolled students: Fall 2023"
For instance, at Amherst, 10% of MA students were admitted, compared to 15% of OOS applicants. MA applicants were an small subset of the overall pool- just 7%. While international students made up 38% of the applicant pool, only 3% of them were admitted.
At Wellesley, 16% of MA students were admitted, compared to 17% of OOS applicants. International students made up 27% of the applicant pool, and 6% of them were admitted.
At Harvey Mudd, domestic applicants were the largest group at 46%, and 11% were admitted. 19% of OOS students were admitted. International students were the smallest pool, and 7% were admitted.