Question

I am building a website that includes a map. However at zoom level 7 it is too small and at level 8 it is too big.

Is there a way to zoom the map at for example 7.5?

Answer 1

No:

Maps on Google Maps have an integer “zoom level” which defines the
resolution of the current view. Zoom levels between 0 (the lowest zoom
level, in which the entire world can be seen on one map) to 21+ (down
to individual buildings) are possible within the default roadmap maps
view.