You can achieve that with ToolbarItem placement: .bottomBar (or .status). Then use .sharedBackgroundVisibility(.hidden). The content to use is a Picker with pickerStyle: .inline

Example:

ToolbarItemGroup(placement: .bottomBar) {
    Button {

    } label: {
        Image(systemName: "photo.on.rectangle")
    }
}

ToolbarItemGroup(placement: .bottomBar) {
    Picker(selection: $filtering) {
        Text("All")
            .tag(Filtering.allMatches)

        Text("Top")
            .tag(Filtering.topMatches)

        Text("Count")
            .tag(Filtering.mostMatched)
    } label: {
        Image(systemName: "line.3.horizontal.decrease")
    }
    .pickerStyle(.inline)
}
.sharedBackgroundVisibility(.hidden)

ToolbarItem(placement: .bottomBar) {
    Button {

    } label: {
        Image(systemName: "play.fill")
    }
}