How to get FK table data when querying PK table in .Net core?

I have a primary key spe_manuscript_num in table SPE_COMMON_DATA and it is FK to other tables:

But the .NET Core model is generated by Scaffold-DbContext like this:

public partial class SpeCommonData
{     
    public string SpeManuscriptNum { get; set; }
    ..
    ..
    public virtual ICollection<SpeAttachment> SpeAttachment { get; set; }
    public virtual ICollection<SpeMiscData> SpeMiscData { get; set; }
}

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
       modelBuilder.Entity<SpeCommonData>(entity =>
        {
               ....
               //nothing about FK tables
        }
        modelBuilder.Entity<SpeMiscData>(entity =>
        {
            entity.ToTable("SPE_MISC_DATA");

            entity.Property(e => e.Id)
                .HasColumnName("id")
                .HasColumnType("numeric(38, 0)")
                .ValueGeneratedOnAdd();

            entity.Property(e => e.SpeManuscriptNum)
                .IsRequired()
                .HasColumnName("spe_manuscript_num")
                .HasMaxLength(32)
                .IsUnicode(false);
             ....
            entity.HasOne(d => d.SpeManuscriptNumNavigation)
                .WithMany(p => p.SpeMiscData)
                .HasForeignKey(d => d.SpeManuscriptNum)
                .HasConstraintName("FK__SPE_MISC___spe_m__02084FDA");
        });
     modelBuilder.Entity<SpeAttachment>(entity =>
        {
            entity.HasKey(e => e.AttachmentId)
                .HasName("PK__SPE_ATTA__B74DF4E2D1989600");

            entity.ToTable("SPE_ATTACHMENT");

            entity.Property(e => e.AttachmentId).HasColumnName("attachment_id");
            ...
            entity.Property(e => e.SpeManuscriptNum)
                .HasColumnName("spe_manuscript_num")
                .HasMaxLength(32)
                .IsUnicode(false);

            entity.HasOne(d => d.SpeManuscriptNumNavigation)
                .WithMany(p => p.SpeAttachment)
                .HasForeignKey(d => d.SpeManuscriptNum)
                .HasConstraintName("FK__SPE_ATTAC__spe_m__3EA749C6");
        });

My question is when I query table SPE_COMMON_DATA I am not able to pull other tables data based on FK I know nothing defined in modelBuilder.Entity<SpeCommonData>?

How to get other tables data also when query SPE_COMMON_DATA, like the ORM model?