I think that this may be the question:
If I buy a plane ticket with a fare that does not include the transport of any of my bags or other items in the hold, for example an Iberia 'Basic' ticket for a flight from Santiago to Madrid, € 59, on 7 February 2023, can I still check my poles at the Santiago airport without having to pay for this because there appears to be a long-standing agreement at this airport that guarantees that walking poles with be transported free of charge.
My answer would be: I don't know. I know that this agreement existed for many years because not only did I read about it in an online news article, I even went to several airline desks when I passed through Santiago airport a few years ago and they all confirmed it. That included not only Iberia but also low cost carrier EasyJet.
I see no reason why this does not continue to be the case in 2023 but perhaps a traveller can confirm it based on own recent experience or because he/she did or does what I did: Ask them.
A word of caution as to the quality of information sources: When I asked this question at the general information desk at Santiago airport the staff had no idea and they had never heard of it.