It may be definition differences between the two companies but here's the first thing that came to mind: by any chance is your new employer a much larger organ

It may be definition differences between the two companies but here's the first thing that came to mind: by any chance is your new employer a much larger organization? In smaller companies you get to wear many hats and typically have responsibility over a wider stretch of <work/tools/technologies>. In larger companies things tend to be much more siloed. So in a larger organization, the things you did in your previous position would likely be spread across multiple positions and teams.