IIRC Garmin map updates were this frequent for my Standalone device. But its along time since I last updated it.

Maybe standards have dropped. I had read that mapping companies are struggling to get updating done at a cost they are willing to pay, even in low wage economies.
(the Garmin in my 2021 car sometimes displayed locations in what I think must have been Pinyin (ie Chinese characters converted into Roman letters that may depict a word by how it sounds rather than correct local spelling (eg Kalay for Calais)
My standalone Garmin was originally sold with 'free updates for life'. I had visions of still getting free updates when I am 100

. Garmin then changed the definition to 'For the life of the device'. Fair enough, I've got 30 year old tech in cupboards that would still be working

(tomorrows antiques

) Garmin again changed the definition to ' for the design life of the device'. In other words Garmi can stop updates whenever they want if they consider its obsolete. Or claim its up to date because the 10 year old update is the most recent they have issued. .