New split test from GSC exports

In Search Console, open Performance → Search results, apply any Page/Query filter for what you're testing, click the Dates tab, pick your date range, then Export → CSV. Do that once for the period before your change and once for the period after, then upload both here.

Optional: repeat the same two exports with no Page/Query filter (whole property) to also see the site-wide trend over the same dates — this is what lets the verdict tell real lift apart from a general traffic swing.