Insert a Blank Row After Every Change of Product

Lorenzo and DrExcel_Excel_MVP Good ones! Just for fun, here's a couple more:

=LET(
   rng, A2:D11,
   v, TAKE(rng,, 1),
   r, ROWS(rng),
   s, SEQUENCE(r),
   n, FILTER(s, IFNA(v <> DROP(v, 1), 0)),
   SORTBY(EXPAND(rng, r + ROWS(n),, ""), VSTACK(s, n))
)

- OR -

=LET(
   rng, A2:D11,
   v, TAKE(rng,, 1),
   s, SEQUENCE(ROWS(rng)),
   DROP(SORT(IFNA(HSTACK(VSTACK(s, FILTER(s, IFNA(v <> DROP(v, 1), 0))), rng), "")),, 1)
)