Hi Simone,
We are in the same situation as you (Surface 7 Laptops and Dymo LabelWriters).
I work in my organisation's IT department so reached out to Dymo and received this response:
"Thank you for contacting us. Our developers are constantly working on improvement of our software in order to deliver it, with the best quality, to the largest number of our consumers possible. However, in case of Microsoft ARM processors, I apologize that currently none of our software versions are compatible with these processors. Currently LabelWriters are only compatible with computers with Windows Intel processors and macOS ARM processor."
I wish it were better news, but until Dymo come to the party with ARM based drivers for Windows there is no way to use their LabelWriters with newer Surface Devices.
Kind regards,
Isaac