composition.php

<?php

class RequestId
{
}
class ClientId
{
}
class AgencyId
{
}
class AgencyUserId
{
}
class ServiceId
{
}

class Deps
{
    public function __construct(
        public ?RequestId $requestId = null,
        public ?ClientId $clientId = null,
        public ?AgencyId $agencyId = null,
        public ?AgencyUserId $agencyUserId = null,
        public ?ServiceId $serviceId = null,
    ) {
    }

    public function unpack(): array
    {
        return array_filter([
            'requestId' => $this->requestId ?? null,
            'clientId' => $this->clientId ?? null,
            'agencyId' => $this->agencyId ?? null,
            'agencyUserId' => $this->agencyUserId ?? null,
            'serviceId' => $this->serviceId ?? null,
        ]);
    }
}

class Opened
{
    public function __construct(
        public RequestId $requestId,
        public ClientId $clientId,
        public ServiceId $serviceId,
    ) {
    }
}

function deps(...$things): array
{
    return (new Deps(...$things))->unpack();
}

$opened = new Opened(...deps(
    requestId: new RequestId(),
    clientId: new ClientId(),
    serviceId: new ServiceId(),
));

print_r($opened);