Move servo with speed and hold position

I found a "workaround", not perfect at all, but it sort of does what I want.

moveTo = (deg: number, ms: number = 1000) => {
    const deg2 = 0.2 + (0.2 - 0.09)/(0.9 - 0.7) * (deg - 0.9);

    this.servo.move(deg2, ms, () => {
      analogWrite(this.sId, (deg) / 50.0, { freq: 20, soft: false });
    });
  }