SYS@i:CDB$ROOT> Select file_type, percent_space_used as used,percent_space_reclaimable as reclaimable, number_of_files as "number" from v$flash_recovery_area_usage;

FILE_TYPE                     USED RECLAIMABLE     number
----------------------- ---------- ----------- ----------
CONTROL FILE                     0           0          0
REDO LOG                         0           0          0
ARCHIVED LOG                  5.84           0         36
BACKUP PIECE                     0           0          0
IMAGE COPY                       0           0          0
FLASHBACK LOG                    0           0          0
FOREIGN ARCHIVED LOG             0           0          0
AUXILIARY DATAFILE COPY          0           0          0

8 rows selected.

SYS@i::CDB$ROOT> Disconnected from Oracle Database 18c Standard Edition 2 Release 18.0.0.0.0 - Production

[oracle@main ~]$ ls -l /u01/app/oracle/fast_recovery_area/I/foreign_archivelog/MAIN/2020_04_16/
total 112192
-rw-r----- 1 oracle oinstall 104858112 Apr 16 06:33 o1_mf_1_39_920575750_.arc
-rw-r----- 1 oracle oinstall 104858112 Apr 16 13:46 o1_mf_1_40_920575750_.arc
-rw-r----- 1 oracle oinstall 104858112 Apr 16 13:51 o1_mf_1_41_920575750_.arc
-rw-r----- 1 oracle oinstall 104858112 Apr 16 14:27 o1_mf_1_43_920575750_.arc
-rw-r----- 1 oracle oinstall 104858112 Apr 16 14:28 o1_mf_1_45_920575750_.arc
-rw-r----- 1 oracle oinstall 104858112 Apr 16 14:55 o1_mf_1_49_920575750_.arc
[oracle@main ~]$

RMAN> list foreign archivelog all;

using target database control file instead of recovery catalog
specification does not match any foreign archived log in the repository

RMAN>

2020-04-16T13:52:14.337740+00:00
STB(3):Media Recovery Log /u01/app/oracle/fast_recovery_area/I/archivelog/2020_04_16/o1_mf_1_41_h9jrq8gr_.arc
STB(3):Resize operation completed for file# 9, old size 307200K, new size 317440K
STB(3):Resize operation completed for file# 9, old size 317440K, new size 327680K
STB(3):Resize operation completed for file# 9, old size 327680K, new size 337920K
STB(3):Resize operation completed for file# 9, old size 337920K, new size 348160K
2020-04-16T13:52:15.293827+00:00