I haven't looked at the underlying legislation yet, but from what I have seen, the RTR (Tight To Repair) in the UK is limited to certain products, and not all of those products will be repairable down to the component level.
This is considerably weaker than laws in other countries which cover a wider range of products. I can only hope the idea will either be adopted by manufacturers to cover items not presently listed, and/or the legislation will be expanded to cover more items.
Don't assume that all products will be covered by this. Its a right to repair not a right to DIY. There are many products (e.g. like gas and electrical appliances and installations) where aspects of their installation repair or even removal are covered by legislation, and they will still need to be performed by competent registered fitters.