how to make parted to print size in MiB size instead of MB

Is there any way to ask parted to print partition sizes in MiB unit instead of MB unit?

Yes:

parted <<<'unit MiB print all'

or

printf %s\\n 'unit MiB print list' | parted

or

parted <<\IN                             
unit MiB print list
IN

Same in interactive mode: launch parted and then enter unit MiB print list