I should've added "gravel/MTB-style" to "How do I do a 10 spd silver dropbar mechanical setup?" Obviously Shimano had silver road groupsets in 10 spd, but if you wanted a wide range cassette you were own your own making it work for dropbars...
Digging into Shimano's website a bit more, it appears that the mechanical special ed. silver will be limited only to 1x10. They're offering the left "dual-control" lever in silver, but do have the left lever as a brake only. Of course, you could make it a 2x10 with a Barcon or DT shifter.
Also, although the marketing copy has the Cues group coming with a 11-48 cassette, both Shimano and the Radavist have the RD-U6000 being able to handle a 50T cassette.
So I guess a silver 1x10 with a 11-50 cassette would be interesting, but not something I'd put on any of my Rivs. Though its pretty close to 1x11 11-51 setup I have on my Romancer. Again, maybe if this existed 10 years ago I would have gone that route, but seems underwhelming in 2025.