Control File Locatons in 18c

I am creating a new 18c database (via DBCA) and by default it lists the locatons of the control files as such:

control01.ctl = "{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"

control02.ctl = "{ORACLE_BASE}/fast_recovery_area/{DB_UNIQUE_NAME}/"

previously I would do something like this:

CONTROL_FILES="/u02/oradata/{DB_UNIQUE_NAME}/control01.ctl, /u02/oradata/{DB_UNIQUE_NAME}/control02.ctl"

I would also tell RMAN to autobackup the controlfiles via:

"CONFIGURE CONTROLFILE AUTOBACKUP ON;"

I don't understand why control02.ctl is in the Fast Recovery Area?