Seems like Eastman has stopped using Nitro finish on any guitar and instead switched to a urethane finish they call Truetone. The Facebook group posted a message from Eastman confirming the switch effective in late May early June this year. I'll see if I can copy the full Eastman response later.
2020 Eastman E10SS/V; 2020 Eastman E2D; 2020 Yamaha FS830; 2021 Farida OT-22W; 2022 Alvarez MD60BG; 2022 AC630 SB; 2023 Eastman AC622CE