If you want to change the selectable numbers of entries per page in Filament Admin, you have to use this method:
protected function getTableRecordsPerPageSelectOptions(): array
{
return [10, 50, 100, 250];
}
Default for these values is 5, 10, 25, 50. Keep in mind, that the first item in this array is the default selection.
For simple resources, you have to place this method in the ManageRESOURCE_NAME.php file in the resources pages folder.
For regular resources, you have to place this method in ListRESOURCE_NAME.php file in the resources pages folder.