Does "80% recycled fiber" mean that the packaging is 80% recyclable?
No.
80% recycled fiber means that the raw material contains 80% recycled material. It does not indicate what portion of the final packaging can be recycled.
Packaging recyclability depends on its design and all materials and components used – for example, paperboard, corrugated board, paper, plastic, adhesives, coatings, metal, or textiles.
Therefore, a high recycled content does not automatically imply the same recyclability rate for the packaging. The PPWR also regulates these concepts separately – recyclability in Article 6, and minimum recycled plastic content in Article 7. (EUR-Lex)