Yeah, it's been listed as active at https://letsencrypt.org/certificates/ for some time now, but if you click on the "Issued by R3" at the bottom to go to crt.sh there are still 0 certificates issued. I do suspect it'll be sometime "real soon now". I don't know if they might take it live at one data center at a time or something, or if it's just a switch they change everywhere all at once.
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