Slur over repeats

[Eef Weenink]

I cannot find an answer for this:
[Scherm­afbeelding 2025-09-16 om 18.11.07.png]

I have a repeat and I want a “semi-slur” going into Volta 2.
Now I solved it with \repeatTie, but would rather see a bit larger slur, so 
users will not get confused.
"PS. This is just a quick and dirty example, where a 4/4 tempo can have 2 to 4 
quarts 😉 "

\relative c''{
  \repeat volta 2 {
    g'1(
    \alternative {
      \volta 1 { (<d, bes'>2) }
      \volta 2 {
bes'4 \repeatTie
   <d, bes'>2
      }
    }
  }
}