As in https://bugs.documentfoundation.org/show_bug.cgi?id=129468 we got new uno command SetReminder, please add new icons for each theme
rizmut committed a patch related to this issue.
It has been pushed to "master":
Breeze*, colibre, elementary, KJ, Sifr*: Fix for tdf#130204
It will be available in 6.5.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.