How to remove/disable on iOS/Android the "App install banner"?

Hello,
I’m using the last version of NextCloud and in particular to show pdf shared files on the website but every time a user open a file, on the top is visibile a banner that suggest to download the Nextcloud App. Is there a way to hide it?

I think the code to remove (or comment) can be found in these pages:
core/templates/layout.guest.php
core/templates/layout.public.php
core/templates/layout.user.php

<?php if ($theme->getiTunesAppId() !== '') { ?>
<meta name="apple-itunes-app" content="app-id=<?php p($theme->getiTunesAppId()); ?>">
<?php } ?>

In the “Theming” section I can’t find anything to do it directly from the control panel.
Also I think that if I comment this meta tag in the three files above, probably they could be overwritten at each Nextcloud update.

How can I fix it?
Is there an instruction to put on config.php to do it?
I think it’s not very professional to constantly show a banner with the name of “Marino Faggiana”.
It may give the impression that you are no longer on the company’s website.
Thanks.