The classical way is to visit sci-hub but it's new paper so it's not there yet. Googling works or doesn't work so it's not guaranteed and I didn't have much success with it in the past.

The real magic trick is writing an email to authors with polite request of a copy. More often than not they will send it.

Maybe we need a mush computer to solve what these words mean.

Direct link to free pdf copy of article: https://arxiv.org/pdf/2108.12691.pdf