How To display different name in index and detail for relationships

[shubhamserverfront]

public function trader(): BelongsTo
{
return $this->belongsTo(Trader::class);
}
account model

    public function accounts(): HasMany
{
    return $this->hasMany(Account::class);
}

trader model

public function fields(NovaRequest $request)
{
    return [

        Tabs::make(__('/'), [
            Tab::make('Trader', [
                BelongsTo::make('Trader')->display(function ($trader) {
                    return $trader->username;
                })
                    ->sortable()
                    ->rules('required')
                    ->required(),
                    
                    this is my account resource 

1. and I want that when I view my account then trader name is showing from relationship
2. but i want trader name for the index and the Account name for the detail
3. Is this possible in any way??