+1 Telerik Blazor should have this chart... By the way in my project i override blazor CandleStick Chart (make even MIN,MAX lines to hide candle stick:) and customize Model to have different collor, and so on) to have something like RangeBar Chart

yes, i would vote for that too. provide a similar feature as here https://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/range-bar-chart/defaultcs.aspx