Increasing Auto-Lock Time to 15 Minutes

Hello,

Is there a work-around or certified third-party App to add additional minute settings to Auto-Lock screen in iOS 14.6 on an iPhone XS Max that is fully up to date.

I’ve had this issue with every generation iPhone and iPad I’ve ever owned.

And, I don’t have any corporate profiles now or in the past with the exception or the Spectrum Mobile profile which rides on the Verizon Network.

if you need any additional information, please let me know.

Thank you in advance!

Jack H.

[Edited by Moderator]