warranties and service plans are administered by "Honda Administration" . Which not actually Honda themselves. The paperwork for my 2021 car says 'Honda administration means "TWG Services Ltd "...... who administers the programme on behalf of Honda.' I have not yet received any paperwork for my 2024 car but I expect it will be the same.
TWG Services are an independent business solutions company , part of an international group who also provide similar services to other car manufacturers etc. In essence Honda (and other car manufacturers) use such companies as agents as it saves them the cost of hiring their own staff skilled in dealing with customer complaints ,refusing as many warranty claims as they can ,referring enquiries to someone else, refusing to pay for servicing if its out of time or mileage,or contravenes other small print and in this case not issuing paperwork until they get round to it.
To be fair, Insurance companies operate in a similar way - the more claims they can find a reason to refuse the better their profits. And just like policy holders can be seduced by a cheaper insurance premium Honda are slow to realise the savings TWG make for them on warranty claims etc reflects on Hondas own reputation, not TWG's.