Just for reference: The smartthings plugin v2 still works fine for me without any problems. I have Schlage lock and it also works fine.
You can get the data you are looking for under the “Render Platform Data for Homebridge config.json” menu in the new app.
I did get a Hubitat hub though and started migrating. There is an app called HubConnect that lets you share devices between Hubitat and Smartthings. So you can migrate gradually.