Micron's FQ1 2026 report says they expect their 1-gamma process (uses EUV) to the be the majority of their bit output by the second half of the year. The same report says they've already begun sampling 1-gamma parts to OEMs, so they must have a fab somewhere using EUV already.
https://investors.micron.com/static-files/530bd7ed-a8c8-4687...
The Boise plant is being reactivated and is not ready for EUV production yet. The Syracuse plant won't be running until 2030. Their Japan and Taiwan fabs are scheduled for the 1-gamma rollout.