[Bug] Translatable subfields does not display flag in label

[manfield]

Bug report

What I did

When creating a relationship type, using subfields, i.e:

 [
                'label'     => trans('custom.attachments'),
                'name'  => 'attachment_blocks',
                'type' => 'relationship',
                'tab' =>  trans('custom.attachments'),
                'force_delete'  => true,
                'subfields' => [
                    [
                        'name' => 'label',
                        'label' => trans('custom.label'),
                        'type' => 'text'
                    ],

fields defined as translatable in the relation model and listed as subfields don't show the translation flag on the label.

Example of the translation flag

Backpack, Laravel, PHP, DB version

When I run php artisan backpack:version the output is:

### PHP VERSION:
8.3.9

### PHP EXTENSIONS:
Core, date, libxml, openssl, pcre, zlib, filter, hash, json, pcntl, random, Reflection, SPL, session, standard, sodium, mysqlnd, PDO, xml, ast, bcmath, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, iconv, igbinary, intl, exif, msgpack, mysqli, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, readline, redis, shmop, SimpleXML, sockets, sqlite3, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, memcached, Zend OPcache, xdebug

### LARAVEL VERSION:
11.23.5.0

### BACKPACK PACKAGE VERSIONS:
backpack/basset: 1.3.6
backpack/crud: 6.7.41
backpack/devtools: 3.1.6
backpack/generators: v4.0.6
backpack/language-switcher: 2.0.0
backpack/medialibrary-uploaders: 1.2.1
backpack/permissionmanager: 7.2.1
backpack/pro: 2.2.21
backpack/settings: 3.1.1
backpack/theme-tabler: 1.2.13
backpack/translation-manager: 1.0.4