Yes, someone I know just got the hearing test and hearing aids (made by Philips) all at Costco (we're in Canada). Very good experience all-around and now this person can hear us like never before. The Philips-made hearing aid can be controlled via bluetooth, smartphone app that allows changing to different presets (for instance going to "comfort mode" when in a loud environment). No clue what that all means if you don't have a smartphone, but figured I'd mention. I've tried to convince others I know to undergo this process.
As for actually treating/helping the hearing loss, it all depends on "why", there are of course many different reasons for hearing loss so I can't comment on that aspect.
BTW in Canada, hearing aids are an eligible medical expense you can include as a tax writeoff: https://www.canada.ca/en/revenue-agency/services/tax/individ...