Make an array expand to the left of the cell with the formula

Is there a way (or workaround) to make an array expand to the left of the cell with the formula? (Above the formula would also work)

Here's a spreadsheet with more detail on what I'm looking for. (I'm using ARRAYFORMULA here, but would be open to a workaround using any function)

https://docs.google.com/spreadsheets/d/1DDoWPJWTr5O9vlhaqKEyKXIGlKVJXbw03Z28ZN-MMe8/