This puzzle was used in a final sprint round so the medium-level was appropriate. I’ll let you in on a secret; when sudoku authors run out of theme ideas, they take a blank grid, plonk in 1-9 along the main diagonal, take a step back, seek more inspiration and hope something good comes out of it.
That was pretty much how this puzzle came about.
Product Sudoku: Classic sudoku rules apply. Given numbers between two cells indicate the product of the two numbers in those cells.