You should speak to the creator of that integration. I believe there are several different integrations companies have written between HubSpot and Magento so I wouldn’t be able to say exactly what properties at the Deal or Contact level they would be using. However if you log into your HubSpot portal, you can see if there were any properties created by the integration. Sometimes they will create separate property groups or use certain naming conventions. At the very least you can look at properties that you don’t remember creating, checking who has the properties populated, and looking at the change source. If the changes source is API, you know it’s coming through the integration.
However, the easiest course of action would just be to ask whoever built the integration you are using.