Using UPDATE through a component, not working

Question

// UPDATE
app.put("/update", (req, res) => {
  const id = req.body.id;
  const slack_id = req.body.slack_id;
  const absent = req.body.absent;
  db.query( "UPDATE developers SET slack_id = ?, absent = ? WHERE id = ?",[slack_id, absent, id],
    (err, result) => {
      if (err) {
        console.log(err);
      } else {
        res.send(result);
      }
    }
  );
});

Backend Update

const handleSubmit = (e, id) => {
      e.preventDefault();
      updateDeveloper(id);
  }

  const updateDeveloper = (id) => {
        Axios.put(`${url}/update`, { slack_id: props.slackId, absent: props.absent, id: id }).then(
          (response) => {
            return (
              {
                id: id,
                slack_id: props.slackId,
                absent: props.absent,
                name: props.name,
                selected: props.selected
              }
            )
          })
        }

I'm trying to have an UPDATE function in React js, I use Props for this, everything works well so far but the only thing which is not working is the update itself. I've been working at this for hours and I cant figure out what the problem is precisely, On the website it works fine but when I press the update button nothing happens. It does catch the necessary ID but that's all, values dont change when I insert them.

if someone can help a hand?

return (
    <div className='formDeveloper'>
      <div>
        <h3>Slack ID:<br /> {props.slackId} </h3>
        <h3>Absent:<br /> {props.absent} </h3>
        <h3>Name:<br />{props.name} </h3>
        <h3>Selected:<br /> {props.selected} </h3>

      </div>

      <div>
        {/* Button Update Developer */}
        <form onSubmit={(e) => handleSubmit(e, props.id)}>
          <input type="text" placeholder="Change Slack ID"/><br></br>
          <input type="number" max="1" placeholder="Change Absence" /><br></br>
          <button type="submit">Update</button>
        </form>
        {/* Button Delete Developer */}
        <button onClick={() => { deleteDeveloper(props.id) }}>Delete</button><br></br>
      </div>
    </div>
  );