Can't Deploy Image to Azure App Service via GitHub Actions - azure-web-app-service

Question

I've tried so many different things here, so i'm super excited to see what the issue is :) (but, im assuming it's something silly on my end)
Here's the pertinent bit of my GitHub actions YML:
deploy:
name: Update Azure App Service
needs: [tests]
runs-on: ubuntu-latest
steps:
- name: Deploy to Azure
uses: azure/webapps-deploy#v2
with:
app-name: $APP_SERVICE_NAME
images: $IMAGE_NAME
publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }}
GitHub actions logs (debug mode):
##[debug]Evaluating condition for step: 'Deploy to Azure'
##[debug]Evaluating: success()
##[debug]Evaluating success:
##[debug]=> true
##[debug]Result: true
##[debug]Starting: Deploy to Azure
##[debug]Loading inputs
##[debug]Evaluating: secrets.AZURE_WEBAPP_PUBLISH_PROFILE
##[debug]Evaluating Index:
##[debug]..Evaluating secrets:
##[debug]..=> Object
##[debug]..Evaluating String:
##[debug]..=> 'AZURE_WEBAPP_PUBLISH_PROFILE'
##[debug]=> '***'
##[debug]Result: '***'
##[debug]Loading env
Run azure/webapps-deploy#v2
::add-mask::***
::add-mask::***
##[debug][GET] https://SNIP.scm.azurewebsites.net:443/diagnostics/runtime
##[debug]loaded affinity cookie ["ARRAffinity=SNIP;Path=/;HttpOnly;Secure;Domain=SNIP-qa-ause.scm.azurewebsites.net","ARRAffinitySameSite=SNIP;Path=/;HttpOnly;SameSite=None;Secure;Domain=SNIP.scm.azurewebsites.net"]
##[debug]getAppRuntime. Data: {"statusCode":200,"statusMessage":"OK","headers":{"connection":"close","content-type":"application/json; charset=utf-8","date":"Fri, 22 Jul 2022 06:27:05 GMT","server":"Kestrel","set-cookie":["ARRAffinity=SNIP;Path=/;HttpOnly;Secure;Domain=app-be-SNIP.scm.azurewebsites.net","ARRAffinitySameSite=SNIP;Path=/;HttpOnly;SameSite=None;Secure;Domain=app-be-SNIP.azurewebsites.net"],"transfer-encoding":"chunked"},"body":{"nodejs":[],"system":{"os_name":"Unix 4.15.0.169","os_build_lab_ex":"","cores":2}}}
##[debug]App Runtime OS: Unix 4.15.0.169
Error: Deployment Failed with Error: Error: Publish profile is invalid for app-name and slot-name provided. Provide correct publish profile credentials for app.
##[debug]Deployment failed
##[debug]Node Action run completed with exit code 1
##[debug]AZURE_HTTP_USER_AGENT='GITHUBACTIONS_DeployWebAppToAzure_0d7e9cbfcd2b52a8a34111a0798ab22d77203fc1f56b2732d2431bfaeb336577'
##[debug]AZURE_HTTP_USER_AGENT=''
##[debug]Finishing: Deploy to Azure
The obvious solution here is what the error says: secret is wrong. It's not. I've added secret to GitHub repository, with the value of the Azure App Service. Done this twice, to make sure i've downloaded it correct, and copied as is.
Other things i've tried:
Tried setting WEBSITE_WEBDEPLOY_USE_SCM to true in the App Service configuration.
Tried setting slot-name to Production in the GitHu action step (even though, there is no slots here)
Other things, that might help solve my problem:
I'm building a .NET image as a Docker image, and pushing this to Azure Containr Registry. I'm then trying to 'update' this, in Azure App Service
The Azure App Service is running Linux, not Windows
"Deployment Center" in App Service still has "Source: Container Registry", pinned to a static image. This is because this was required when i setup App Service. But i assume that my GitHub actions builds will override this?
Any help would be great. :) Thanks in advance!
EDIT
I know i can:
Push to a constant tag, e.g latest
Set the image name to latest in Azure App Service
Set continuous deployment to "on" in Azure App Service
And this will automatically update App Service, because of the webhook.
But this will not help production scenarios, as i need to create different image tags, for different versions i can rollback. Since the version is different, i can't "pin" to a constant tag. Therefore, i need some kind of task to update Azure App Service with a specific tag. I'd prefer to have the same CI for dev/prod.