Earwax build-up can affect hearing, but you’d need a lot of wax to seriously dampened it. I’ve seen cases where the wax completely blocked the canal. As you know a wax blockage easily removed, it just needs a gentle hand. And cheaper than one of those infernal aids.
Wax or any sort of canal blockage does not affect the important working parts of the middle ear or the cochlear which can have problems of their own.
A slight hearing loss in both ears at your age is really very good.
I’d happily trade you any one of my sort-of-still functioning body parts for one of your lugs, if that were at all possible.