tabViewBottomAccessory causes unstable view identity for views accessing Environment or State

Views placed inside tabViewBottomAccessory that access @Environment values or contain @State properties experience unstable identity, as shown by Self._printChanges(). The identity changes on every structural update to the TabView, even though the view's actual identity should remain stable. This causes unnecessary view recreation and breaks SwiftUI's expected identity and lifecycle behavior.

Environment

• Xcode Version 26.2 (17C52)
• iOS 26.2 simulator and device

struct ContentView: View {
  @State var showMoreTabs = true

  struct DemoTab: View {
    var body: some View { Text(String(describing: type(of: self))) }
  }

  var body: some View {
    TabView {
      Tab("Home", systemImage: "house") { DemoTab() }
      Tab("Alerts", systemImage: "bell") { DemoTab() }
      if showMoreTabs {
        TabSection("Categories") {
          Tab("Climate", systemImage: "fan") { DemoTab() }
          Tab("Lights", systemImage: "lightbulb") { DemoTab() }
        }
      }
      Tab("Settings", systemImage: "gear") {
        List {
          Toggle("Show more Tabs", isOn: $showMoreTabs)
        }
      }
    }
    .tabViewBottomAccessory {
      AccessoryView()
    }
    .task {
      while true {
        try? await Task.sleep(for: .seconds(5))
        if Task.isCancelled { break }
        print("toggling showMoreTabs")
        showMoreTabs.toggle()
      }
    }
    .tabBarMinimizeBehavior(.onScrollDown)
  }
}

struct AccessoryView: View {
  var body: some View {
    HStack {
      EnvironmentAccess()
      WithState()
      Stateless()
    }
  }
}

struct EnvironmentAccess: View {
  @Environment(\.tabViewBottomAccessoryPlacement) var placement

  var body: some View {
    // FIXME: EnvironmentAccess: @self, @identity, _placement changed.
    // Identity should be stable
    let _ = Self._printChanges()
    Text(String(describing: type(of: self)))  }
}

struct WithState: View {
  @State var int = Int.random(in: 0...100)
  var body: some View {
    // FIXME: WithState: @self, @identity, _id changed.
    // Identity should be stable
    let _ = Self._printChanges()
    Text(String(describing: type(of: self)))
  }
}

struct Stateless: View {
  var body: some View {
    // Works as expected: Stateless: @self changed.
    let _ = Self._printChanges()
    Text(String(describing: type(of: self)))
  }
}

This bug seems to make accessing TabViewBottomAccessoryPlacement impossible without losing view identity; the demo code is affected by the bug. Accessing a value like @Environment(\.colorScheme) is similarly affected, making visually adapting the contents of the accessory to the TabView content without losing identity challenging if not impossible.

Submitted as FB21627918.