Can I have classic app and new app LIVE at the same time with diff domains?

I am transitioning my classic app to the new apps slowlyyy - as I find time!!!

I am almost done building out the customer facing part on the new app (but I haven’t even started doing the back end stuff like sign in, building accounts, analytics, etc.)

Can I launch the customer facing side with a different domain? Ideally I’d love to have the customer facing version as a subdomain of my informational website now that it’s so computer friendly.

For example:

my classic app is at: ververy.app
my informational website/lead is: ververy.com

Can I make this new version something like: app.ververy.com?

And then duplicate the new app when I’m done with all the back end capabilities to keep the ververy.app domain?