Trellis on single X & Y axis Merged

My company has started using Control Charts. The functionality to add Control Charts (Lines & Curves - Add Horizontal line +/- 1 StdDev) is excellent and functions wonderfully with filtering. However, my company is constantly adding processes that will improve a KPI. We'd like to be able to track those changes, aka use a line chart but with multiple Control Charts by COVID Periods for example(Pictured). The best way I've found to split control charts is to trellis, but trellising duplicates the entire line graph, rather than just splitting the Control Chart. This breaks the continuous line graph and makes it look like there's gaps in the data. Could you please add functionality that would either split the Lines & Curves data by trellis, or add functionality to allow trellising to use a single X&Y axis instead of multiple with the same data.