I have done some research during the last 2 days and can now definetely confirm that there is a new type of Hero of Labor Medal in Cuba. This new Version hast got a large gear now behind the star, actually quite similar looking to those sold at ebay right now.
This can be also seen on the cuban award sites:
http://www.trabajadores.cu/heroe
Comparing the date of the pictures, this new typ of award seems to be in official use since around 2021, as the 2020 awardess seem to still have received the older, known type.
Also the Cuban Hero of Labour Award Ceremonies which can be found at Youtube, show this new design around 2021, when you look very closely - see pic below.
Still, about these medals sold online I can't tell if those are wearers copies, tourist souvenirs or the real deal. I am not even sure if wearers copies are/were common in cuba. Also what I found to be quite uncommon, is, that each award seems to be available as a screwback AND as a pinback Version - with otherwise very minor to non-existant differences. (excluding the miniature sizes). Could this have to do anything with first and second class of this medal?
What I also realized is, that the hole of the support plate where the ring goes through looks quite large on the versions at ebay. So it could be that this new 2021 award Version already has another subtype (if ebay medals are the real deal).
PS. About "caribbean" and "cuba" wording in description, what pride wrote is true - ebay does not allow cuba products to be sold and paypal will make a deep check and / or block payment when word "cuba" shows up, they are also blocking quite some communist countries products that way.