https://www.aliexpress.us/item/3256807080569011.htmlI recently picked up the ZTTO 9-46t 11 speed cassette. Everything looks good, I was able to shift through all the gears with proper indexing. It's just under 337g for the cassette. Everything is riveted (no screws), steel cogs from 9-40 and alloy at 46t. 9t seems to work well (not as bad as some people make it out to be). In comparison, the all-steel Spedao 10-42t 11 speed cassette weighs around 359g.
Only downside is shifting is sub-optimal with a standard Shimano GRX 812 RD. The cage rubs in the 2nd to big cog if the B screw isn't turned further in, but doing so it affects high gear shifting. It'll shift, but not in-spec smooth. I'm already looking at acquiring a GRX 822 RD to get better shifting or just go with an Garbaruk cage for the 812 RD.
I would have preferred if it was a 9-42t cassette, but with similar construction to the Spedao 10-42t (not the cheap screw spider version for $35 USD), but I see this cassette more like an all-steel 9-40t with an emergency 46t bailout.