AWS RDS SQL Server Instance, Question in Maintenance Plan

New to cloud and have questions on AWS RDS SQL Server Instance, Question in Maintenance Plan. As a DBA team we are expecting RDS access and admin access on SQL box. But was limited with setupadmin and process admin. Not able to see the error log even. I don't even see the maintenance plan under management. Questions: 1) Why limiting access? since we are not the DBAs for these servers? 2) Do we need to set up regular backups(full, log) for the user databases of AWS will be taking care of it? 3) How about the user database maintenance like index maintenance and update stats? Thank you in advance !