Buenas,
Gracias por la respuesta, pero soy incapaz... ni con la versión 5 ni 4...

instalé npm y nada tampoco!
Mira te dejo el código y me dices si hago algo mal. Insisto cuando meto la parte de bootstrap, desaparecen los iconos y sale el código.
<!DOCTYPE html>
<html lang="es" >
<head>
<meta charset="UTF-8">
<title>Inventari ICS</title>
<link rel='stylesheet' href='//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css'>
<link rel='stylesheet' href='//cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.10.0/bootstrap-table.min.css'>
<link rel='stylesheet' href='//rawgit.com/vitalets/x-editable/master/dist/bootstrap3-editable/css/bootstrap-editable.css'>
<link rel="stylesheet" href="
https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css"><!-- partial -->
<script src='//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src='//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js'></script>
<script src='//cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.10.0/bootstrap-table.js'></script>
<script src='//cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.9.1/extensions/editable/bootstrap-table-editable.js'></script>
<script src='//cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.9.1/extensions/export/bootstrap-table-export.js'></script>
<script src='//rawgit.com/hhurz/tableExport.jquery.plugin/master/tableExport.js'></script>
<script src='//cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.9.1/extensions/filter-control/bootstrap-table-filter-control.js'></script><script src="./script.js"></script>
<link rel="stylesheet" href="
https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css"><link rel="canonical" href="
https://getbootstrap.com/docs/5.3/examples/buttons/"></head>
<body>
<div class="row table-responsive">
<div class="panel-heading"><h2>Inv</h2></div>
<div class="panel-body">
<?php
$co1 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE es='MI'");
$row=mysqli_fetch_array($co1);
$res1= $row['COUNT(*)'];
$co2 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE es='PE'");
$row=mysqli_fetch_array($co2);
$res2= $row['COUNT(*)'];
$co3 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE es='BA'");
$row=mysqli_fetch_array($co3);
$res3= $row['COUNT(*)'];
$co4 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE es='MIGRI'");
$row=mysqli_fetch_array($co4);
$res4= $row['COUNT(*)'];
$co5 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE op='1'");
$row=mysqli_fetch_array($co5);
$res5= $row['COUNT(*)'];
$co6 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE call='1'");
$row=mysqli_fetch_array($co6);
$res6= $row['COUNT(*)'];
$co7 = $mysqli->query("SELECT COUNT(*) FROM alumnos WHERE enq='1'");
$row=mysqli_fetch_array($co7);
$res7= $row['COUNT(*)'];
echo '<div align="center">
<table width="700" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><div align="center">Mi:</div></td>
<td><div align="center">Mig:</div></td>
<td><div align="center">Cep:</div></td>
<td><div align="center">Ceb:</div></td>
<td><div align="center">Op Automàtiques:</div></td>
<td><div align="center">Call:</div></td>
<td><div align="center">En:</div></td>
</tr>
<tr>
<td><div align="center"><h2>'.$res1.'</h2></div></td>
<td><div align="center"><h2>'.$res4.'</h2></div></td>
<td><div align="center"><h2>'.$res2.'</h2></div></td>
<td><div align="center"><h2>'.$res3.'</h2></div></td>
<td><div align="center"><h2>'.$res5.'</h2></div></td>
<td><div align="center"><h2>'.$res6.'</h2></div></td>
<td><div align="center"><h2>'.$res7.'</h2></div></td>
</tr>
</table></div>'
?>
<table
id="table"
data-toggle="table"
data-height="600"
data-search="true"
data-regex-search="true"
data-pagination="true"
data-url="json/data1.json">
<thead>
<tr>
<th data-field="id">ID</th>
<th data-field="ger">Ger</th>
<th data-field="cod" >Codi</th>
<th data-field="ser">Ser</th>
<th data-field="seu">Seu</th>
<th data-field="in">iN</th>
<th data-field="es">Es</th>
<th data-field="obs">Obs</th>
<th>Acc</th>
</tr>
</thead>
<tbody>
<?php
while($row1 = $resulta->fetch_array()){
//while($row1 = mysql_fetch_array($resulta)){
?>
<tr>
<td><?=$row1[0]?></td>
<td><?=$row1[1]?></td>
<td><?=$row1[2] ?></td>
<td><?=$row1[4]?></td>
<td><?=$row1[5]?></td>
<td><?=$row1[8]?></td>
<td><?=$row1[21]?></td>
<td><?=$row1[23]?></td>
<td>
<div class="d-flex gap-2 justify-content-center py-5">
<button type="button" class="btn btn-outline-secondary btn-rounded" data-mdb-ripple-color="dark">Editar</button>
<button type="button" class="btn btn-outline-danger btn-rounded" data-mdb-ripple-color="dark">Eliminar</button>
</div>
</td>
</tr>
<?php } ?>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
La cosa es que me gusta mucho como queda con el buscador y el paginado, pero que no hay manera de meter los iconos para editar y eliminar.
Se te ocurre algo?
Mil gracias de nuevo!!!!!