A simple example of a "team" service in PHP.

TeamService.php

<?php

namespace App\Services;

use App\Entity\Team;
use App\Repository\TeamRepository;

class TeamService
{
    const TEAM_CATEGORIES = [
        'World Tour' => ['WTT'],
        'Women World Tour' => ['WTW'],
        'Pro Teams' => ['PRO', 'PRT'],
        'ProContinental Teams' => ['PCT'],
        'Continental Men' => ['CTM'],
        'Continental Women' => ['CTW'],
    ];

    private TeamRepository $teamRepository;

    public function __construct(TeamRepository $teamRepository)
    {
        $this->teamRepository = $teamRepository;
    }

    /**
     * @return array<string, array<Team>>
     */
    public function findTeamsByCategories(int $year): array
    {
        $teams = [];

        foreach (self::TEAM_CATEGORIES as $teamCategoryName => $teamCategory) {
            $teams[$teamCategoryName] = [];
            foreach ($teamCategory as $category) {
                $teams[$teamCategoryName] = array_merge(
                    $teams[$teamCategoryName],
                    $this->teamRepository->findBy(['year' => $year, 'category' => $category])
                );
            }
        }

        return $teams;
    }
}