Datatable with 50k + lines fails me - php

Question

I am mounting a table and perfect until I want to show more data, I have read that I can use server side but I have not found any example how to consume an web service that returns json
html
<table id="datatable-buscador" class="display nowrap" style="width:100%">
<thead>
<tr>
<th>Nº reco.</th>
<th>Fecha</th>
<th>Id trabajador</th>
<th>Trabajador</th>
<th>Id empresa</th>
<th>Ref. Int.</th>
<th>Nombre empresa</th>
<th>Visado</th>
<th>Prop.</th>
</tr>
</thead>
</table>
javascript
let $tabla = jQuery("#datatable-buscador");
$tabla.dataTable().fnDestroy();
$tabla.dataTable({
"scrollX": true,
"lengthMenu": [[15, 25, 30, -1], [15, 25, 30, "All"]],
"lengthChange": false,
"order": [1, "desc"], //columna 0 y ordenar desc
"language": { "url": "/src_reconocimientos/includes/js/utils/spanish.json" },
"ajax": {
url: "/example/example.php",
type: "POST",
dataType: "JSON",
data: { "tipo": tipo, "dias_reco": diasReco },
timeout: 180000 //3 min
},
"createdRow": function (row, data, dataIndex) {
jQuery(row).attr("id", data.N_RECONOCIMIENTO);
},
"columnDefs": [
{
// targets: "_all",
targets: [0, 1, 2, 4, 5, 7, 8],
className: 'dt-body-center'
},
],
"columns": [
{ "data": "N_RECONOCIMIENTO" },// 0
{
"data": null,
render: function (data, type, full, meta) {
return formatFecha(data.FECHA_RECONOCIMIENTO);
}
}, //1
{ "data": "DNI" }, // 2
{ "data": "NOMBRE_TRABAJADOR" }, // 3
{ "data": "EMPRESA" }, // 4
{ "data": "REF_INTERNA" }, // 5
{ "data": "NOMBRE_CLIENTE" }, // 6
{ "data": "VISADO" }, // 7
{ "data": "PROP" }, // 8
]
});
json:
{
"data": [{
"N_RECONOCIMIENTO": 29457,
"FECHA_RECONOCIMIENTO": "2021-10-11",
"DNI": "28460Q",
"NOMBRE_TRABAJADOR": "CAMPS",
"EMPRESA": 112390,
"REF_INTERNA": "Ref_interna?",
"NOMBRE_CLIENTE": "example",
"VISADO": "N",
"PROP": "Prop?"
}, {
"N_RECONOCIMIENTO": 2907,
"FECHA_RECONOCIMIENTO": "2021-10-14",
"DNI": "414J",
"NOMBRE_TRABAJADOR": "CARLOS",
"EMPRESA": 103482,
"REF_INTERNA": "Ref_interna?",
"NOMBRE_CLIENTE": "(ACUERDO DE COLABORA)",
"VISADO": "N",
"PROP": "Prop?"
}, {
"N_RECONOCIMIENTO": 2619,
"FECHA_RECONOCIMIENTO": "2021-04-16",
"DNI": "72306W",
"NOMBRE_TRABAJADOR": "DIEZ",
"EMPRESA": 29514,
"REF_INTERNA": "Ref_interna?",
"NOMBRE_CLIENTE": "example 365, S.L.",
"VISADO": "S",
"PROP": "Prop?"
}]
}
when pointing to the url of the ajax what it returns me is a json that changes the content according to the data that I pass to it, but when I want to get more 50000 records, the table fails me, so I want to implement serverside, how can I implement it and keep pointing the same url? I don't see anything related in the datatables examples
add info:
It is a very simple company webservice that receives data through my php script with cURL, in this it receives a type of request (it can be 1, 2, 3) and receives parameters (variables), the web services does the queries, simple queries and returns the result as json, it cannot be interacted any more, that's why when I try to process 50000 the datatable gives me an error. my question is: how can I do an intermediate step to process so many lines?