I have yet to see any evidence beyond angry internet comments that registering in every country is actually required.
If you sell directly to consumers from a web shop, that is you.
A selection of such guides:
https://www.ppwrconsulting.com/blog/ppwr-small-business-sme/
https://packdeclare.com/blog/ppwr-sme-guide
https://getreadycompliance.eu/ppwr-extended-producer-respons...
This is exactly what I mean by regulation believers. Here you have all the evidence you need that the harm is done, yet you believe it's still about some philosophical debate whether the regulation even works that way.