ES-1 is the most important figure, though? As you say, it is a summary, and the authors consider it their best estimate, hence they put it first, and in the executive summary.

Figure 1.1 does show a single source from 2018 (Shehabi et al) that estimates almost flat growth up to 2017, that's true, but the same graph shows other sources with overlap on the same time frame as well, and their estimates differ (though they don't span enough years to really tell one way or another).