Dynamics with multiple voices

[Cameron Hall]

I'm trying to add dynamics to a part that splits into two, then goes
back into a unison section. The problem is that the crescendo starts in
the divisi section and ends in the unison section. I've tried this, but
it doesn't allow me to terminate the crescendo. I want the crescendo to
start in measure two and end with the forte in measure 7.

Thanks,
Cameron

%%%
\version "2.24.4"
{
  \clef bass
  \time 3/4
  <>^"div."
  <<
    { \repeat unfold 4 { r4 e e | } }
    \\
    { \repeat unfold 2 { c2. | g,2. | } }
    \new Dynamics { s2.\p | s2.*3\< | }
  >>
  e4^"unis." f g |
  f e d |
  c2.\f |
}
%%%