You could using ultra-thick cases and don't need to concern that hard to press physical button. Legacy Mode Accessibility Mode No more needs physical button now! Support Power Menu. Long press on App icon that you will got pop up sub-menu - volume control and power menu
The download of this application is 100% safe. The app has been originally created by stanwu.org and it is listed among the Tools category. The latest update of this application was released on Mar 18, 2019 and Phone Lock + Volume Control was downloaded by over 100K users.
Google Play shows that the app is rated 4.2 by its users. Get the free installation package of Phone Lock + Volume Control 1.8.20 and take a look at users' reviews on Droid Informer.