Which methods to include in service class using service / repository pattern?

I am practicing using the Service / Repository pattern in a C# / .NET 8 app and have some questions about best practices.

Below is an example interface for one of the services:

namespace NCAAMB.Services.Interfaces;

public interface IEspnBasketballService
{
    Task<EspnBasketballTeam?> GetBasketballTeam();

    string GetTeamName(EspnBasketballTeam? team);

    string GetNextEventId(EspnBasketballTeam? team);
}

And the corresponding service class:

namespace NCAAMB.Services;

public class EspnBasketballService : IEspnBasketballService
{
    private readonly ILogger<EspnBasketballService> _logger;
    private readonly IEspnBasketballRepository _espnRepo;

    public EspnBasketballService(GetBasketballTeam() espnRepo, ILogger<EspnBasketballService> logger)
    {
        _espnRepo = espnRepo;
        _logger = logger;
    }

    public Task<EspnBasketballTeam?> GetBasketballTeam() => _espnRepo.GetBasketballTeam();

    public string GetTeamName(EspnBasketballTeam? team)
    {
        try
        {
            if (team == null)
            {
                throw new Exception("Team obj was null.");
            }

            return team?.team?.name ?? string.Empty;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex.Message);
        }

        return string.Empty;
    }

    public string GetNextEventId(EspnBasketballTeam? team)
    {
        try
        {
            if (team == null)
            {
                throw new Exception("Team obj was null.");
            }

            return team?.team?.nextEvent?.First()?.id ?? string.Empty;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex.Message);
        }

        return string.Empty;
    }
}

What I think I got right:

• I believe GetBasketballTeam() is being used in the service correctly which is calling IEspnBasketballRepository to fetch data from an API endpoint

What I think I currently got wrong:

• I am thinking GetTeamName() and GetNextEventId() should not be included in the service. If not, what do you think is best practice for housing these methods? Utility class, extension methods, etc? I would also like the ability to have these methods testable and include logging.

Any suggestions and examples? Thanks in advance!