How to redirect dd progress in terminal to a log.txt file but still display it on the terminal during the process?

Here is my script :-

sudo mate-terminal --geometry=50x10 -x sh -c "dd if=/dev/sda of=/dev/sdb status=progress 2>&1 | tee log.txt | md5sum > hash.txt | sha1sum > hash1.txt"

I've seen people giving this suggestion all the time; putting 2>&1. But this will only display the progress in the log.txt file and the terminal will display nothing. Here's a picture of what the progress look like on the log.txt file.

If I remove 2>&1 and just go with

command | tee log.txt

Only the terminal will show the progress and nothing will display in the log.txt file

I've also tried:-

(command 2>&1) | log.txt

command 2> | log.txt

and many more I can't recall. So can someone help me?

The progress is output to STDERR rather than STDOUT. You could get something like what you want by doing tail -f on the file being written to like this:

mate-terminal --geometry=50x10 -x sh -c 'tail -f log.txt'
sudo dd if=/dev/sda of=/dev/sdb status=progress 2> log.txt"

tail -f log.txt will print everything being written to log.txt to the new smaller terminal and run as a background process so you can issue more commands while it runs.
2> sends STDERR stream to log.txt. If there is any output on STDOUT it will display in the terminal from which the command or script is run.

Redirect both stderr and stdout with |& in bash:

sudo mate-terminal --geometry=50x10 -x bash -c "dd if=/dev/sda of=/dev/sdb status=progress |& tee log.txt"