Map content/details and styling

The map and details in HA map cards, etc. are coming from OSM, aren’t they?

If yes, then I have two questions:

a. Can I switch to other styling templates from OSM or adjust the styling on my own?

b. How to adjust the details and/or why is the content that different to OSM?

e.g. HA

OSM

80% of the houses are missing, etc.

The tileset used is hardcoded, afaict.
HA uses List of available basemaps in CARTO | CARTO

O.k. Thanks. I will seach for this in the codeing and perhaps change the color-style for me.

But I really wonder, why the forms of the houses and the number of shown houses in general are that different as in OSM. Hm. :face_with_raised_eyebrow:

I suspect your 2 screenshots are not at the same zoom level…
I surely see all buildings at my place…

No, the houses are missing independently from zoom level.