masalah

mungkin bisa mencoba berikut

$tombol = '<div class="btn-group btn-small " style="text-align: right;">
<button class="btn btn-danger delete-pegawai" title="Hapus Pegawai" data-pegawai-id="' . $r->nama . '"><span class="fas fa-trash"></span></button>
<button class="btn btn-warning edit-pegawai" title="Edit Pegawai" data-pegawai-id="' . $r->nama . '"><span class="fas fa-user-edit"></span></button>
</div>';

foreach ($query->result() as $r) {
$data[] = [
$no++,
$r->nama,
$r->nip,
$r->divisi,
$r->jenis_izin,
$r->tanggal_izin,
$r->tanggal_masuk,
'tombol'=>$tombol

];
}