During the conversation with Bart van Wollust I found out that wool is used for more than just clothing, insulation and as a filling material. The growing popularity of natural cemeteries has meant that wool now also serves as body bags for the deceased.
I also saw an episode of De Keuringsdienst van waarden that there is wool in Vitamide D tablets.
Inspired by the book Pig 05049 by Christien Meindertsma I started a search for other surprising uses of wool:

Pig 05049 by Christien Meindersma

Vitamin D pills
Normally you produce vitamin D through sunlight. But in the winter months the sun is too weak, so we take pills. But how do they get the sun in all those pills?
https://www.youtube.com/watch?v=1agBcRNqdH4&ab_channel=NPO3

winding sheet

https://www.buitengewoonafscheid.nl/lijkwade/


https://www.koester.nu/a-43722969/lijkwaden/lijkwade-schoonebeeker-schaap/

Woolgro - New Zealand
Woolgro lawn mats combine the natural nutrients found in unscoured dag wool with the moisture retention properties of natural recycled jute and paper fibres and the best grass seed for your location. Unscoured dag wool typically contains a handy range of natural nutrients well balanced to feed grass and the natural nutrients slowly release into the soil resulting in thick healthy green grass with strong deep roots. The recycled fibres holds approximately 60% of their own weight as water and this dramatically improves seed germination and reduces the amount of irrigation required.
https://www.woolgro.co.nz/grass-seed-mat