Lock Screen of the iPhone lost it's feature of the Volume Bar back in 2022. But worry no more. You can use the feature back again following just few simple steps.
Lock Screen No-longer an Obstruction for any Activities in your iPhone

Changing the volume is no more a hectic task now even if your iPhone screen is locked. You neither have to use the side buttons of your iPhone again and again nor do you have to unlock your phone's screen just for volume adjustment.
Adjusting the volume using the side buttons is no doubt easy but it still limits your satisfaction somehow. Either the sound becomes too loud or too low when you use the volume keys. So is there no way out to fix this problem?
Yes of course there is! The only thing to fix this issue is to update the latest version of iOS. With this you can get back the volume bar on your iPhone's lock screen. This makes it easier for you to adjust the sound using just the volume bar on the locked screen itself.
A Bit of Knowledge about the Volume Bar

It came as a shocker for the iPhone users when back in 2022 this feature was taken down with the release of iOS 16. After two years this feature makes a comeback with iOS 18.2 in December 2024. Just follow a few steps and you will be ready to use volume bar on your screen even when locked.
Follow the Simple Steps to Enjoy the Feature
First you have to open the settings app on your iPhone and second click on the Accessibility bar. Third step is to click on the option of Audio and Visual under Hearing and when you get it finally click on to Always Show Volume Control.
That's all it you have to follow. So from the next moment onwards when you listen to anything with audio you can easily adjust the sound by using the volume bar on the screen no matter if unlocked or locked or whether you are on the go or relaxing at home. So here's wishing you happy listening.