"many products" is correct and usable in written English. You can use it when referring to a group of items or services that a company offers. Example: This company manufactures and sells many products, ranging from bicycles to kitchen appliances.
Many products lacked photographs.
There are also many products in between.
There are many products available.
It had too many products.
Many products are advertised as "chemical free".
Motorola was turning out too many products, and I think they were overdesigning too many products".
Kinnerton: has a nut safety promise on many products (kinnerton.com).
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union