They have a bunch of quality XD ZTTO 1x 9-46/50t cassettes in 11 speed configuration. The only one in road sizes is the 11 speed Spedao 10-36t, though it has the advantage of having a steel big cog and being around 280g.
I'm currently using an XDR 12 speed 10-33t cassette. It's in the low 200g range, but at the expense of an alloy 33t big cog. It works fine, but I'm using a KMC X12 chain, not sure how it plays with SRAM flat top chains.