swiftui Generic parameter could not be inferred

Question

I get compiler error:

Generic parameter 'ViewModel' could not be inferred

at this point

NavigationLink(destination: TabbedView(viewModel: getModel(subSection: subSection.subSection), contentController: ContentController(), subSection: subSection.subSection)) {
                        Text(subSection.subSection.title)
                    }

my functions:

func getModel<ViewModel: ModelProtocol>(subSection: SubSection) -> ViewModel {
    if(SubSection.TEXT.contains(subSection.category)){
        return getLiteratureModel(subSection: subSection) as! ViewModel
    }
    if(SubSection.QUESTION.contains(subSection.category)){
        return getTwoStepsModel(subSection: subSection) as! ViewModel
    }
}
func getLiteratureModel(subSection: SubSection) -> some ModelProtocol{
    let literatureModel = LiteratureModel<Any>()
    
    literatureModel.update(subSectionId: subSection.id, category: subSection.category, lightMode: colorScheme == .light, dataSource: dataSource)
    literatureModel.prepareData()
    
    return literatureModel
}
func getTwoStepsModel(subSection: SubSection) -> some ModelProtocol{
    let twoStepsModel = TwoStepsModel<Any>()
 
    twoStepsModel.update(subSectionId: subSection.id, category: subSection.category, lightMode: colorScheme == .light, dataSource: dataSource)
    twoStepsModel.prepareData()
  
    return twoStepsModel
}

my classes

class LiteratureModel<ViewModel>: TextViewModel, ModelProtocol {...}

class TwoStepsModel<ViewModel>: TextViewModel, ModelProtocol {...}

of Protocol:

protocol ModelProtocol: ObservableObject {
associatedtype ViewModel
var htmlText: String { get } ...}

View that is called:

struct TabbedView<ViewModel>: View where ViewModel: ModelProtocol{
@ObservedObject var viewModel: ViewModel
var contentController: ContentController
var subSection: SubSection

var body: some View {
    GeometryReader { geoProxy in
        TabView {
            if(SubSection.TEXT.contains(subSection.category)){
                BaseTextView(viewModel: viewModel as! LiteratureModel<ViewModel>, contentController: contentController).padding()
                    .tabItem {
                        Text(NSLocalizedString("lesson", comment: ""))
                    } }
            if(SubSection.QUESTION.contains(subSection.category)){
                BaseTextView(viewModel: viewModel as! TwoStepsModel<ViewModel>, contentController: contentController).padding()
                    .tabItem {
                        Text(NSLocalizedString("lesson", comment: ""))
                    } }
                    ...

My intention is, to reuse BaseTextView and therefore using generic type for the two Observables LiteratureModel and TwoStepsModel. I have to instantiate these classes before TabbedView gets instantiated, otherwise the Observables would be unwillingly reinstantiated.

Maybe I'm confused about Protocol, Generics, Typealias, Opaque ...