Printing duration in appian

There is no ready made function. In my toolbox there is an expression which splits the string generated from the duration and displays is as required.

Depending on your use case, this pattern might fit:

https://docs.appian.com/suite/help/23.2/duration-display-pattern.html

a!localVariables(
    local!parts: split(ri!value, ":"),
    local!days: tointeger(index(local!parts, 1, 0)),
    local!hours: local!days * 24 + tointeger(index(local!parts, 3, 0)),
    local!minutes: tointeger(index(local!parts, 4, 0)),
    substitute(
      trim(
        text(
          local!hours*100+local!minutes,
          "## 00"
        )
      ),
      " ",
      ":"
    ),
  )