It looks a lot like the 1972 Sears Free Spirit in this post.
Bike makers used different decals on the same bike at different times.
This frame was used in different configurations for single speed coaster brake bikes, three speed, five speed and ten speed bikes.
If you had access to Sears catalogs from 1970 to 1975 you could probably hunt down the exact decals and configuration.
According to the post:
It’s a 1972 Free Spirit Sheffield sold by Sears.
this bike is actually made by a bicycle manufacturer called Puch in Austria.
I believe both of these bikes have 24 inch wheels, this would explain why it's sold as a children's bike. Adult versions of this bike in this era had 26 inch wheels.
Finding a bike exactly like the red coaster brake bike can be tricky - they come and go.
If you broaden your search to a "ladies coaster brake bicycle" you will find a lot more options to choose from.
- Stick with brand names you recognize as bicycle makers.
- Never buy anything without riding it.
As a rule of thumb I try to stay away from anything branded as Sears. The bike pictured here would be an exception. In the 80s and 90s Sears sold thousands (millions?) of poorly made and assembled bicycles.