I saw your harness question but, for some unknown reason, I was unable to post on that thread.
I’m not familiar with the specific harness you pictured, but Chewy does sell several harnesses by the same maker. This is one of them:
https://www.chewy.com/lil-pals-patte...clip/dp/222398
Is there a specific characteristic of the Daisy harness you pictured that helps a small dog post surgery?