No, a lab report is not required by default. According to Article 5 of the PPWR, you are not obligated to prove compliance with the PFAS limits using a laboratory report. A simple written declaration from the manufacturer stating that no PFAS has been intentionally added is a completely valid and sufficient basis. You only need a lab report with concrete figures if PFAS is actually present in a product, or if the manufacturer cannot provide such a declaration. So, in most cases, you are good to go without any extra paperwork!