Most of the EcoDesign legislation covers lightbulbs, e.g. energy efficiency, lifetime, minimum CRI, and energy efficiency levels. Assuming you just sell 3rd party bulbs that are already compliant with UK/EU legislation, this is of no concern.
The only part that could be of concern is that in the lamp the light bulb must be replaceable. Also, if your lamp has a separate lighting controller (as opposed to the one built into mains LED bulbs), this must also be replaceable.
The Ecodesign for Energy-Related Products and Energy Information (Lighting Products) Regulations 2021: https://www.legislation.gov.uk/uksi/2021/1095/contents/made
Regulation (EU) 2019/2020 of 1 October 2019 laying down ecodesign requirements for light sources and separate control gears: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02019R2020-20210901