1. modules/contrib/social_profile_field/src/Plugin/Field/FieldFormatter/SocialProfileFieldDefaultFormatter.php
Call to deprecated function check_url(). Deprecated in drupal:8.0.0 and is removed from drupal:9.0.0. Use UrlHelper::stripDangerousProtocols() or UrlHelper::filterBadProtocol() instead. UrlHelper::stripDangerousProtocols() can be used in conjunction with \Drupal\Component\Render\FormattableMarkup and an @variable placeholder which will perform the necessary escaping. UrlHelper::filterBadProtocol() is functionality equivalent to check_url() apart from the fact it is protected from double escaping bugs. Note that this method no longer marks its output as safe.
2. modules/contrib/social_profile_field/social_profile_field.info.yml
Add core_version_requirement: ^8 || ^9 to designate that the module is compatible with Drupal 9. See https://drupal.org/node/3070687.
Needs work
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I am unable to get this patch to apply clean against 8.x-1.x-dev and this patch is a prerequisite of 💬 Drupal 10 compatibility Needs review so I am unable to get a Drupal 10 compatible version of this module.