class Incidents(db.Model):
  __tablename__ = 'incidents'
  uid = db.Column(db.Integer, primary_key = True)
  orgname = db.Column(db.String(100))
  email = db.Column(db.String(120), unique = True)
  topic = db.Column(db.String(100))
  body = db.Column(db.String(2000))
  
  def __init__(self, orgname, email, topic, body):
    self.orgname = orgname.title()
    self.email = email.lower()
    self.topic = topic.title()
    self.body = body.title()

@app.route('/all')
def show_all():
  data = Incidents.query.all()
  return render_template('all.html', data=data)

@app.route('/all')
def show_all():
  data = Incidents.query.all()
  print(data)   # Есть там что-нибудь вообще?
  return render_template('all.html', data=data)

print(data)

{% for i in range(10) %}
     {% for incident in data %}
          <tr>
              <td>{{ data[i].uid }}</td>
              <td>{{ data[i].orgname }}</td>
               <td>{{ data[i].email }}</tb>
               <td>{{ data[i].topic }}</tb>
               <td>{{ data[i].body }}</td>
         </tr>
   {% endfor %}
{% endfor %}