Access Metabase over VPN instead of Certificate

Hello wanted to know how we can setup the ability to access Metabase using a VPN link rather than a certificate while our Metabase instance is on AWS. We currently have it setup so you need a certificate. However it doesn’t create the same experience across the board as accessing the URL is different on Chrome, Safari and Firezilla. So we are thinking to opt for a VPN solution. This is really left field for me and I was wondering how to best set that up.

Kind Regards,
Bach Singh