Smartbnb doesn't change any of the settings of your Airbnb account. You can expect your Airbnb account to work the exact same way after connecting to Smartbnb.
Smartbnb does not interfere with your usage of Airbnb. This means you can still communicate with your guests, send pre-approvals or decline guests, accept or reject requests to book, change your Airbnb password or payout details, and do all the many operations you usually do on Airbnb as usual.
For the sake of clarity, Smartbnb will not change your Airbnb password, and cannot access your payout details.