I also get this warning about the Noesis.GUI nuget package when compiling with IsAotCompatible in my project file:

warning NETSDK1206: Found version-specific or distribution-specific runtime identifier(s): win10-arm, win10-x64, win10-x86.
Affected libraries: Noesis.GUI. In .NET 8.0 and higher, assets for version-specific and distribution-specific runtime identifiers will not be found by default.
See https://aka.ms/dotnet/rid-usage for details.

I'll my testing is done with NoesisGUI 3.2.1 and .NET 8.0 RC1

Also there is an issue with the WebBrowser when publishing as a single file (required by AOT)

So these in the .csproj file:
<SelfContained>true</SelfContained>
<PublishSingleFile>true</PublishSingleFile>

Get this error:
System.ArgumentNullException: Value cannot be null. (Parameter 'path1')
at System.ArgumentNullException.Throw(String paramName)
at System.IO.Path.Combine(String path1, String path2)
at NoesisApp.WebBrowser.StaticInitialize()
at NoesisApp.WebBrowser..ctor()
at lambda_method256(Closure)
at Noesis.Extend.CreateInstance(IntPtr nativeType, IntPtr cPtr)

Just a quick update... I tried this again with Noesis 3.2.3 and noticed it's both Noesis.GUI and Noesis.App that produce trim warnings:

....nuget\packages\noesis.app\3.2.3\lib\netstandard2.0\Noesis.App.dll : warning IL2104: Assembly 'Noesis.App' produced trim warnings. For more information see https://aka.ms/dotnet-illink/libraries
...\source\repos\theia\sbc_sw\src\SystemUpdate\SystemUpdate\SystemUpdate.csproj
....nuget\packages\noesis.gui\3.2.3\lib\netstandard2.0\Noesis.GUI.dll : warning IL2104: Assembly 'Noesis.GUI' produced trim warnings. For more information see https://aka.ms/dotnet-illink/libraries
...\source\repos\theia\sbc_sw\src\SystemUpdate\SystemUpdate\SystemUpdate.csproj