Pay on Behalf – extended producer responsibility EPR

I have tentatively started selling in DE and FR, my origin is UK. Now I am learning of yet another EU law to comply with that of packaging. My item has packaging and no other liability. I see that Amazon offers a yearly fee:
Charges an annual service fee of €24.99 + 3% of the eco-contribution fees paid on your behalf per EPR category, plus eco-contribution fees.

Anyone any idea of what the 3% could amount to? It isn’t clear anywhere. Also as I have used BIL for IT and ES also will there be fees auto applied even though I am not actively advertising there yet.

Not sure where I can see what has been auto setup for me in each region. I’d maybe like to back out of EU selling altogether until I grow more and have more resources to help.

What are you guys all doing? I am not really realising any profits at this point but I have invested a lot.