🇫🇷France @hproustacx

First issue :
in web/themes/contrib/ui_suite_dsfr/components/share/share.twig Line 6 should be

{% set link_attributes = link.link_attributes|default({}) %}

to allow attribute from menu or other entities

Second issue :
There is no way to properly contribue that component in Drupal, you either have to do some custom entities, or rework the links in Javascript
Possible solution would be to contribute that component as a menu and use token in the url field to respect the pattern of the DSFR example :
https://www.facebook.com/sharer.php?u=[ insert current page url]

hproustacx → created an issue.

pdureau → credited hproustacx → .

hproustacx → created an issue.