Monthly security patches are important for Android smartphones since some potential security issues get patched. Nokia phones are among the few that get those updates on a monthly bases. Sometimes the update is not so fast or regular, but it eventually arrives on the phone.
Nokia 8.3 5G just received the December security patch which is now available here in Croatia, but also elsewhere according to the users. The update is 62.98 MB in size and brings just the patch.
Do check if the update is available for your gorgeous Nokia 8.3.
By the way, the official phone security update tracking page from Nokia Mobile seems to be down when checked for the PC browser, but if you go there over the mobile, the site is working well.