I’m not coming up with a lot of useful (clear) results when searching for a solution to this issue.
Is it OK to simply dd the 128GB disk to the 32GB disk using count to stop after the 16GB partition was cloned?
A bit more context: I had to clone a 16GB eMMC and only had a 128GB SD around. Now I purchased a 32GB eMMC and want to clone it again. The partition holds a root filesystem for an ARMv8 device. I don’t have the 16GB eMMC anymore, that would have been the easy way out.
Use a clonezilla boot usb. I did exactly what you’re trying with clonezilla: 16gb partition on a 128gb ssd to a 64gb ssd. The clone disk is in a production machine rn and has been for two months.