Hi! Do you have a paint like this? https://www.resincoat.co.uk/en/all-products/132-resincoat-non-slip-decking-paint.html#/colour-light_grey/profile-fine/size-25kg
Unfortunately no we do not have a similar paint product for this application to a timber decking.
If the timber decking is bare you could consider Osmo Anti-Slip Decking Oil for a clear anti-slip option.