Why selectColumn is not working

use Spatie\Permission\Models\Role as SpatieRole;
class Role extends SpatieRole
{
    // relationships
    public function user() :HasMany
    {
        return $this->hasMany(User::class);
    }
}

    public function role()
    {
        return $this->belongsTo(Role::class);
    }

 public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')
                    ->searchable(),
                Tables\Columns\TextColumn::make('email')
                    ->searchable(),

                Tables\Columns\SelectColumn::make('role')
                    ->searchable(),

                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
    }