Change view=accordion to view=tabs in the editor form or make fields always visible

[DeMiro5001]

Joomla v5.1.1
I know that it's not really clear.

What I did : I have created some fields and field groups. And I have made some changes in the "‎/templates/cassiopeia/html/com_content/form/edit.php" file so that the fields display right after the title in the edit form. It's working except it is hiding in small screens. I looked for the code in the console and what I understood :

• If I change accordion in this line by tabs, the display of different tabs changes and the fields I have created appear (or if I change the breakpoint to very small value) :

<joomla-tab id="com-content-form" orientation="horizontal" recall="" breakpoint="768" view="accordion"><div role="tablist" hidden=""><button aria-controls="editor" role="tab" type="button" aria-expanded="true">Contenus</button><button aria-controls="publishing" role="tab" type="button">Publication</button></div>

What I was expecting : the fields don't hide in small screen

I looked in different overrides, disabled the cache. It's been days of search, so I may have scrambled ideas..
I hope I was clear. I am not sure if the fields hiding is an expected behaviour, but I would like that the fields always be shown.
Thanks a lot for your help and if you have any question feel free may be I am missing something obvious

[DeMiro5001]

In the backend, the fields are shown but not correctly.
I don't have the right experience with css, but I have noticed that the tab of fields has class=form-grid, but the tabs of images and links has class=row. when I change the class from form-grid to row, the display is much better.
Some images to illustrate what I mean :

And after changing it to row

[DeMiro5001]

What I have done :

• Create an override for com_content/form
• Edit the override and move <?php echo LayoutHelper::render('joomla.edit.params', $this); ?> before <?php echo $this->form->renderField('articletext'); ?>

The fields now don't show on small screens

[DeMiro5001]

Finally, I fixed this :

• Create an override for css/vendor/joomla-custom-elements/joomla-tab.css
• Search for joomla-tab[view="accordion"] joomla-tab-element
• Change display: none; to display: block;
  Now all the tab elements show