I've been trying to implement a parent workflow that determines its children workflows dynamically to be run serially, I came across this example:

return [
    yield ChildWorkflowStub::make(MyChildWorkflow1::class),
    yield ChildWorkflowStub::make(MyChildWorkflow2::class),
    yield ChildWorkflowStub::make(MyChildWorkflow3::class),
];

but I would like to do something like:

$children = [];
for($a=0;$a<5;$a++){
    $children[] = yield ChildWorkflowStub::make(MyChildWorkflow1::class);
}
return $children;

but I have been unsuccessful with very mixed results, sometimes they run in parallel sometimes the parent workflow gets stuck in waiting and so on, is this something that its even possible and what would be the correct way to achieve this?

Thanks