how can I add a newline using logic app or powerautomate?

I'm trying to add newline in String using Logic App. But I got nothing interesting.

That is what I got:

ios-youtube, keepassium-ios, markmcguill-strongbox, Office-Word, microsoft-azureauthenticator, microsoft-scmx, Office-Excel, microsoft-skydrive, Office-Powerpoint, spotify-client, Office-Word, microsoft-onenote, uhhhmagine-flannl, robbie-HomeAssistant, rdc-ios, microsoft-skydrive, skype-teams, miketigas-OnionBrowser, netflix-Netflix, bjoerndemming-aldisued, delius-klasing-bike-app, delius-klasing-tour, heise-ch-magazin, heise-ct-magazin, heise-news4, online-norma, sec-lidl, delius-klasing-ios, robbie-HomeAssistant

I tried these.

and I want the result in this form.

- ios-youtube, 
- keepassium-ios, 
- markmcguill-strongbox, 
- Office-Word, 
- microsoft-azureauthenticator,
- microsoft-scmx, Office-Excel,
- microsoft-skydrive, 
- Office-Powerpoint, 
- spotify-client, 
- Office-Word, 
- microsoft-onenote, 
- uhhhmagine-flannl, 
- robbie-HomeAssistant, 
- rdc-ios, 
- microsoft-skydrive, 
- skype-teams, 
- miketigas-OnionBrowser, 
- netflix-Netflix, 
- bjoerndemming-aldisued, 
- delius-klasing-bike-app, 
- delius-klasing-tour, 
- heise-ch-magazin, 
- heise-ct-magazin, 
- heise-news4, 
- online-norma, 
- sec-lidl, 
- delius-klasing-ios, 
- robbie-HomeAssistant

This basic flow shows you a fairly simple approach that should get you over the line.

Flow

The expression in the second step looks like this (noting the hyphen at the start in the image to cater for the very first record) ...

replace(variables('String'), ', ', ',
- ')

... but when I entered it, I put it in like this ...

    replace(variables('String'), ', ', ',\n- ')

To achieve that, you need to go into the Code View and edit the definition and change \\n to \n. Reason being, when you enter it through the designer, it's not what you're after. The code view will looks like this ...

"Initialize_Enhanced_String": {
    "inputs": {
        "variables": [
            {
                "name": "Enhanced String",
                "type": "string",
                "value": "- @{replace(variables('String'), ', ', ',\\n- ')}"
            }
        ]
    },
    "runAfter": {
        "Initialize_String": [
            "Succeeded"
        ]
    },
    "type": "InitializeVariable"
}

... and that isn't correct. Remove the second slash will get you across the line.

Result

I have reproduced in my environment and got expected results as below:

Design:

Then initialized an empty variable and the composed variable 1 with split(variables('var1'),','):

Then in ForEach loop taken input (compose 1 output) then in action used concat in composeconcat('- ',items('For_each')) and then appended var2 and then joined it with new line(just press enter):

Output:

Codeview:

{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"Compose": {
"inputs": "@split(variables('var1'),',')",
"runAfter": {
"Initialize_variable_2": [
"Succeeded"
]
},
"type": "Compose"
},
"For_each": {
"actions": {
"Append_to_array_variable": {
"inputs": {
"name": "var2",
"value": "@outputs('Compose_2')"
},
"runAfter": {
"Compose_2": [
"Succeeded"
]
},
"type": "AppendToArrayVariable"
},
"Compose_2": {
"inputs": "@concat('- ',items('For_each'))",
"runAfter": {},
"type": "Compose"
}
},
"foreach": "@outputs('Compose')",
"runAfter": {
"Compose": [
"Succeeded"
]
},
"type": "Foreach"
},
"Initialize_variable": {
"inputs": {
"variables": [
{
"name": "var1",
"type": "string",
"value": "ios-youtube, keepassium-ios, markmcguill-strongbox, Office-Word, microsoft-azureauthenticator, microsoft-scmx, Office-Excel, microsoft-skydrive, Office-Powerpoint, spotify-client, Office-Word, microsoft-onenote, uhhhmagine-flannl, robbie-HomeAssistant, rdc-ios, microsoft-skydrive, skype-teams, miketigas-OnionBrowser, netflix-Netflix, bjoerndemming-aldisued, delius-klasing-bike-app, delius-klasing-tour, heise-ch-magazin, heise-ct-magazin, heise-news4, online-norma, sec-lidl, delius-klasing-ios, robbie-HomeAssistant\n"
}
]
},
"runAfter": {},
"type": "InitializeVariable"
},
"Initialize_variable_2": {
"inputs": {
"variables": [
{
"name": "var2",
"type": "array"
}
]
},
"runAfter": {
"Initialize_variable": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"Join": {
"inputs": {
"from": "@variables('var2')",
"joinWith": "\n"
},
"runAfter": {
"For_each": [
"Succeeded"
]
},
"type": "Join"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {},
"triggers": {
"manual": {
"inputs": {
"schema": {}
},
"kind": "Http",
"type": "Request"
}
}
},
"parameters": {}
}