I've got one of these SV3CHome gizmos that just replaces the indoor knob of the deadbolt, and leaves the outside as-is. It works well, although for my schlage lock, the mounting bracket is off-center from the hole, so you need to use the included expansion adapter. It can be set up/controlled with the Tuya app, so it's compatible with HA too. It's a little funky looking, but it works well and it still accessible with the same outside key. No keypad outside, if that's important, so you either need the app on your phone, or the key to unlock it from the outside.