I just added some budget L-Twoo GR9 11 speed 1x shifters to my latest roadie/gravel build. The shifters are paired with a Shimano GRX 400 RD, 11-32t cassette and GRX 600 42t 1x crankset. They are Shimano 2:1 ratio compatible, but shift Campagnolo style with an upshift lever by the hoods. They're quite slim, but with a very-pronounced raise in the hoods (they feel like small horns). I was planning to go with 105 R7000 shifters for this 1x build, but these L-Twoo shifters come in at 400g (vs 105 R7000 500g) and cost about $50 USD. Shifting is pretty good, much better than the Sensah Team Pro shifters I tried which are also Shimano compatible. They also have a solid clank when you shift, versus my softer feeling Shimano levers on my other bikes. The only downside is that you can't upshift in the drops, but for the price, weight reduction and shift performance it's not a big issue. As far as I'm aware, these are the only Shimano compatible 11 speed 1x shifters besides the GRX 600/800 line-up.
