@FetchRequest doesn't respect fetchBatchSize

Hello,

I am building a list in SwiftUI, using the @FetchRequest property wrapper to fetch core data entities, taking as input a fetch request which has the property fetchBatchSize set to 50.

import SwiftUI
import CoreData

extension Item {
    static var listRequest: NSFetchRequest<Item> {
        let request = Item.fetchRequest()
        request.fetchBatchSize = 50
        request.sortDescriptors = [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)]

        return request
    }
}

struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext

    @FetchRequest(fetchRequest: Item.listRequest)
    private var items: FetchedResults<Item>

    var body: some View {
        NavigationView {
            List {
                ForEach(items) { item in
                    Text(item.timestamp!, formatter: itemFormatter)
                }
            }
        }
    }
}

But when loading my list with 3000 items and having the argument -com.apple.CoreData.SQLDebug enabled, there are 241 calls made to load my items 50 by 50 at a time. There is no mention of fetchBatchSize in the documentation, but this feature of fetch request is really important to me when building App dealing with large datasets of objects.

Am I doing something wrong or is there any recommandation about large data sets performances with SwiftUI lists indicating the best practices?

Thanks for your help !