Adding point works

Models/Equipment.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Collections.Generic;
+
+namespace GazpromApp.Models;
+
+public class Equipment
+{
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; set; }
+    [Required]
+    public string Name { get; set; } = string.Empty;
+    [Required]
+    public string Description { get; set; } = string.Empty;
+    [Required]
+    public int PointId { get; set; }
+    public int ImageId { get; set; }
+
+    // EF stuff
+    public Image? Image { get; set; }
+    public Models.Point? Point { get; set; }
+    public List<Property> Properties { get; } = [];
+}

Models/Image.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace GazpromApp.Models;
+public class Image
+{
+    
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; set; }
+    [Required]
+    public byte[] Bytes { get; set; } = [];
+    // EF stuff
+    public List<Point> Points { get; set; } = [];
+    public List<Equipment> Equipment { get; set; } = [];
+}

Models/Point.cs

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+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace GazpromApp.Models;
+
+public class Point
+{
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; set; }
+    [Required]
+    public string? Name { get; set; } = string.Empty;
+    [Required]
+    public string? Description { get; set; } = string.Empty;
+    [Required]
+    public double Latitude { get; set; } = 0;
+    [Required]
+    public double Longitude { get; set; } = 0;
+    // EF stuff
+    public List<Image> Images { get; set; } = [];
+    public List<Equipment> Equipment { get; set; } = [];
+    public List<Property> Properties { get; } = [];
+}

Models/Property.cs

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+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+namespace GazpromApp.Models;
+
+public class Property
+{
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; set; }
+    public int ParentId { get; set; }
+    [Required]
+    public string Name { get; set; } = string.Empty;
+    public string Value { get; set; } = string.Empty;
+    public List<Models.Point> Points { get; set; } = [];
+    public List<Equipment> Equipment { get; } = [];
+}