Фильтрация списка из базы данных с помощью Func

public interface IClientService
{
    Task<List<Client>> SearchClientsByPhone(string phone);
 
    Task<List<Client>> SearchClientsByName(string name);
}

public class ClientService : IClientService
{
    private readonly ApplicationContext _context;
 
    public ClientService(ApplicationContext context)
    {
        _context = context;
    }
 
    public async Task<List<Client>> SearchClientsByPhone(string phone)
    => await SearchClients(x => x.Phone.StartsWith(phone));
 
    public async Task<List<Client>> SearchClientsByName(string name)
        => await SearchClients(x => x.Name.StartsWith(name));
 
    private async Task<List<Client>> SearchClients(Expression<Func<Client, bool>> filter)
        => await _context.Clients.Where(filter).AsNoTracking().ToListAsync();
 
}

[ObservableProperty] private ObservableCollection<Client> _clients = new();
[ObservableProperty] private bool _searchTelephone = true;
[ObservableProperty] private bool _searchName = false;
[ObservableProperty] private bool _searchStateNumber = false;
[ObservableProperty] private string? _searchString = null;
 
public async Task SearchParameters()
    {
        List<Client> result;
        if (_searchName)
            result = await _clientService.SearchClientsByName(_searchString);
        else
            result = await _clientService.SearchClientsByPhone(_searchString);
 
        Clients = new ObservableCollection<Client>(result);
    }