Thanks. Fantastic. Really thought, that it is not already available/working. But yes, it is working as wanted and expected.
Here with row_span: n+1, then the empty cells are maximizing and only let the filled the needed space. Wanted here.
But wit row_span: n, it is working as expected as well, where the “parallel”-rows are equily distributed.
At least not as wanted. My reuirement ist, that the rows in column 2 and 3 are still top-aligned. And this is not possible in this way.
