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...