The official security update page for Nokia smartphones has been updated today by HMD with details about the availability of October Security update for all Nokia smartphones. The page lists Build number and details like whether it is just a security patch or firmware update + security patch for a particular devices.
As per the updated information provided on the page, currently October Security update is available for all Nokia smartphones but Nokia 1, 2.1 and 6.1. This includes the latest Nokia 7.1 too.
In case the security update is not yet available for your Nokia smartphone, you should check the build number of your smartphone and confirm it with the information provided on the page. If the build number for a particular device is mentioned in the list then only it gets the update.
You can also click here for our detailed coverage of all software update news related to Nokia smartphones