Those look like emoji, did you change the system emoji font?
If I did it wasn't through the system settings gui, would it be in fontconfig or somewhere else?
Why do you think those are incorrect? I'm pretty sure it uses the Breeze icons when it can.
See other replies, it did not look lie that initially.
Looks correct to me
Here's what it looks like on a default KDE Neon user edition live .iso, different icons.
KDE
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org, check whether it has been reported.
If it hasn't, report it yourself.
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Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.