A simple example of my prefered MVC implementation, with featuring the Model, a View, a Controller, and a ViewModel.

M-V-C-VM_-_Controller_example.php

<?php
// src/UI/Admin/Some/Controller/Namespace/Detail/SomeEntityDetailController.php

namespace UI\Admin\Some\Controller\Namespace\Detail;

// use ...

final class SomeEntityDetailController
{
    /**
     * @var SomeRepositoryInterface
     */
    private $someRepository;
  
    /**
     * @var RelatedRepositoryInterface
     */
    private $relatedRepository;

    /**
     * @var TemplateEngineInterface
     */
    private $templateEngine;

    public function __construct(
        SomeRepositoryInterface $someRepository,
        RelatedRepositoryInterface $relatedRepository,
        TemplateEngineInterface $templateEngine
    ) {
        $this->someRepository = $someRepository;
        $this->relatedRepository = $relatedRepository;
        $this->templateEngine = $templateEngine;
    }

    /**
     * @return mixed
     */
    public function get(int $someEntityId)
    {
        $mainEntity = $this->someRepository->getById($someEntityId);
        $relatedEntityList = $this->relatedRepository->getByParentId($someEntityId);

        return $this->templateEngine->render(
            '@Some/Controller/Namespace/Detail/details.html.twig',
            new DetailsViewModel($mainEntity, $relatedEntityList)
        );
    }
}

M-V-C-VM_-_ViewModel_example.php

<?php
// src/UI/Admin/Some/Controller/Namespace/Detail/DetailsViewModel.php

namespace UI\Admin\Some\Controller\Namespace\Detail;

// use ...

final class DetailsViewModel implements TemplateViewModelInterface
{
    /**
     * @var array
     */
    private $mainEntity = [];

    /**
     * @var array
     */
    private $relatedEntityList = [];

    /**
     * @var bool
     */
    private $shouldDisplayFancyDialog = false;

    /**
     * @var bool
     */
    private $canEditData = false;

    /**
     * @param SomeEntity $mainEntity
     * @param RelatedEntity[] $relatedEntityList
     */
    public function __construct(SomeEntity $mainEntity, array $relatedEntityList)
    {
        $this->mainEntity = [
            'name' => $mainEntity->getName(),
            'description' => $mainEntity->getResume(),
        ];

        foreach ($relatedEntityList as $relatedEntity) {
            $this->relatedEntityList[] = [
                'title' => $relatedEntity->getTitle(),
                'subtitle' => $relatedEntity->getSubtitle(),
            ];
        }
        
        $this->shouldDisplayFancyDialog = /* ... some complex conditional using the entities data ... */ ;
        
        $this->canEditData = /* ... another complex conditional using the entities data ... */ ;
    }

    public function getMainEntity(): array
    {
        return $this->mainEntity;
    }

    public function getRelatedEntityList(): array
    {
        return $this->relatedEntityList;
    }

    public function shouldDisplayFancyDialog(): bool
    {
        return $this->shouldDisplayFancyDialog;
    }

    public function canEditData(): bool
    {
        return $this->canEditData;
    }
}