how to get value from an input

I would like to retrieve the start and end date value and apply it to two other date fields

<Formik                    initialValues={{                        date_debut: '',                        date_fin: '',

validationSchema={SubmitFormValidation}                    onSubmit={async (values) => {                        console.log(values.jour_mois);                        const dataSubmit = {                            date_debut: values.date_debut,                            date_fin: values.date_fin,

<FieldDateTimeFormFormik label={'Date de début *'} id={'date_debut'} submitCount={submitCount} error={errors.date_debut} widthLabel="w-[168px]" /><FieldDateTimeFormFormik label={'Date de fin *'} id={'date_fin'} submitCount={submitCount} error={errors.date_fin} widthLabel="w-[168px]" />

and apply on this two input

<div className="flex gap-3"><FieldDateFormFormik                                                label={'Début répétition'}                                                id={'date_debut_repetition'}                                                submitCount={submitCount}                                                error={errors.date_debut_repetition}                                                widthLabel="w-[168px]"                                            /><FieldDateFormFormik                                                label={'Date fin répétition'}                                                id={'date_fin_repetition'}                                                submitCount={submitCount}                                                error={errors.date_fin_repetition}                                                widthLabel="w-[168px]"                                            /></div>

i tried to add initial value

const FieldDateTimeFormFormik: React.FC<Props> = ({ id, label, submitCount, error, dateMin = false, widthLabel, dateMinValue, positionnement = 'row' }) => { return ( <> <FieldDefaultFormatFormFormik id={id} label={label} submitCount={submitCount} error={error} widthLabel={widthLabel} positionnement={positionnement}> <Field className="form-select" name={id} id={id} component={DateTimePickers} dateMin={dateMin} dateMinValue={dateMinValue} /> </FieldDefaultFormatFormFormik> </> ); };