Yes. copy/paste the Configuration List. See the documentation:
https://docs.hubitat.com/index.php?title=Lutron_Integrator
You are aware that you have to use the Smart Bridge Pro version of the hub, right?
As for #2, you could give all 90 different device names and it would export to Alexa.
I'm not sure, but I believe 2 Lutron Hubs can only be done with RA2. Yes, you can install two instances of the Lutron Integrator (one for each hub), but I believe the issue is that only RA2 allows you to change the radio frequency for the communication to Lutron devices.
See:
