https://wccftech.com/download-ios-12-4-6-update-for-iphone-ipad-ipod-touch/

You can go ahead and download iOS 12.4.6 for iPhone, iPad and iPod touch for older devices like iPhone 6, iPhone 5s, iPad mini 2, iPod touch 6, etc.

Apple really dropped a heavy hammer on a range of devices when it released iOS 13 and iPadOS 13. However, the surprise got stranger when Apple started issuing software updates for iPhones, iPads and iPod touches which were left forever on iOS 12. Today, the company is taking that journey one step further and you can download iOS 12.4.6 for all compatible devices as a free over the air update right now.