"growing in demand" is correct and usable in written English.
You can use it when talking about something that is increasingly desired or requested. For example, "Online education is growing in demand as more people stay home during the pandemic."
Suiting accessories, such as narrow ties, pocket squares, briefcases and men's shoulder bags, tie bars and cuff links, have become increasingly popular and are growing in demand.
Tea experts, also known as tea masters or sommeliers, are growing in demand at luxury hotels around the globe.
A byproduct of crystalized cane sugar, which was growing in demand at the time, molasses was abundant in sugar-producing areas like the Caribbean.
Due to shifting demographic, economic, and technological trends and the desire of patients to live at home as long as possible, home care is growing in demand.
I mentioned Wild West films in the course of which this sort of plain carpentry grew in demand.
Remarkable grow in demand both of mobile platform operability performance and reduction of project leading time development encourage to apply modern algorithms and reliable engineering tools for the design process.
It's a feature that's only likely to grow in demand as major mobile players like Apple and Google push developers to build AR apps through initiatives like ARKit and ARCore.
As secular works grew in demand, triptychs were often broken up and sold as individual works, especially if a panel or section contained an image that could pass as a secular portrait.
Likewise, Chicago, at No. 5, has felt the effects of a housing supply growing in excess of demand.
Online courses are rapidly growing in popularity and demand.
"LivingSocial is well-positioned to play a growing role in demand generation for both local and national merchants," said Gautam Thakar in a statement.
