good-repo.cs

// variant 1
public async Task<bool> DoWork(IList<SomeItem> items)
{
  // assume _context is our EF Context
  foreach (var item in items.Where(x => x.Id % 2 == 0))
  {
    var it = await _context.FirstOrDefaultAsync(x => x.Id == item.Id);
    _context.Remove(it);
  }
  
  await _context.SaveChangesAsync();
}

// variant 2
public async Task<bool> DoWork(IList<SomeItem> items)
{
  // assume _context is our EF Context
  var targetItems = await _context.Items.Where(
    x => items.Where(x => x.Id % 2 == 0).Contains(x.Id)).ToListAsync());
  foreach (var item in targetItems)
  {
    _context.Remove(item);
  }
  
  await _context.SaveChangesAsync();
}