Azure Functions now supports .NET 8 preview 7 for applications using the isolated worker model and running on Linux Elastic Premium and Dedicated plans.
Functions projects using the latest versions of Microsoft.Azure.Functions.Worker and Microsoft.Azure.Functions.Worker.Sdk can adjust their target framework setting without the need for additional changes.
These projects can be deployed to newly created apps on Linux Elastic Premium and Dedicated plans which are configured to support .NET 8.
For more info: https://learn.microsoft.com/azure/azure-functions/dotnet-isolated-process-guide