If you are expecting dd command to run in foreground and display current progress status. try running command with status=progress flag:
sudo dd if=/dev/sda of=/dev/sdb status=progress This will dynamically display the progress.
That's an extension of the GNU implementation of dd (added in version 8.24 released in 2015), also available in the dd implementation on FreeBSD since 12.0 (2018), but generally not other implementations including on other BSDs.