In the NavigationView you can use the itemIconSize attribute. The default value is 24dp.
Something like:

<com.google.android.material.navigation.NavigationView
    app_itemIconSize="32dp"
    ..>

You can also use a custom style:

<style name="MyNavigationView" parent="Widget.MaterialComponents.NavigationView">
  <item name="itemIconSize">...</item>
</style>

and then:

<com.google.android.material.navigation.NavigationView
    style="@style/MyNavigationView"
    ..>

Standard:

After:

I want to change the size of the icons but i dont know how. I have seen posts where people fix that but i dont understand them. Can you help me with my code?

<?xml version="1.0" encoding="utf-8"?>

    <item
        android_id="@+id/page_1"
        android_enabled="true"
        android_icon="@drawable/casa"
        android_title="skere"/>
    <item
        android_id="@+id/page_2"
        android_enabled="true"
        android_icon="@drawable/map10"
        android_title="skere2"/>
    <item
        android_id="@+id/page_3"
        android_enabled="true"
        android_icon="@drawable/oferta_ic"
        android_title="skere3"/>
    <item
        android_id="@+id/page_4"
        android_enabled="true"
        android_icon="@drawable/calendario"
        android_title="skere4"/>

I want this icons to be bigger