The power of Jailbreak is you can customize your iPhone’s UI as you like. Here is a Cydia Tweak that is specially designed for lock screen that allows you to change the look of your lock screen’s text and it’s called Lafon by iOS developer Aesthyrica.
The tweak is free to install from https://repo.packix.com repo and supports iOS 11 as well as iOS 12 Jailbreak.
Lafon has its own preference pane in the Settings app where you can configure custom font for the Time, Date, Battery charged text and more.
How To Install Lafon On iPhone Running iOS 11 and iOS 12 Jailbreak
1: Launch Cydia
2: Add a new repo https://repo.packix.com by going to Source – Edit – Add
3: Now in the Search tab, search for Lafon and Install it
So this is all and you can customize the lock screen font as you want. Are you going to install this tweak?