Unable to extend the LVM in oracle VM

Hello,

I have resize the VDI file from 250GB to 270GB., it has display in VM, so I have partition the /dev/sdb for new partition /dev/sdb2 and then create pvcreate /dev/sdb2 and then lvcreate and lvextend and finally resize2fs too. But I unable to extend the /u01 Filesystem.

Please advise on this, how to extend the /u01 filesystem to use the allocated 20G space.

[root@<REMOVED> ~]# cat /etc/oracle-release
Oracle Linux Server release 7.9

[root@<REMOVED> ~]# df -Th /u01
Filesystem Type Size Used Avail Use% Mounted on
/dev/sdb1 ext4 246G 213G 20G 92% /u01

[root@<REMOVED> ~]# lsblk