The phrase "an increasing variety" is correct and usable in written English.
It can be used to describe a growing range or assortment of items, options, or experiences.
Example: "In recent years, there has been an increasing variety of plant-based food products available in grocery stores."
Alternatives: "a growing range" or "a wider selection".
This has led to an increasing variety of measurements of public sector efficiency.
Robots are being deployed in an increasing variety of environments for longer periods of time.
Taking into consideration today's dietary trends and the ready availability of an increasing variety of vegetables, Paul Chou, the owner, is currently adjusting and redesigning his table menu.
In the era of ubiquitous digital technologies, operations empowers an increasing variety of organizations, ever more modular, connected, and distributed, ever more centered on software and data.
The resulting trend to lightweight engineering is leading to an increasing variety of materials, on the one hand.
The executive looking for leadership training has an increasing variety of options, from a journey in the Himalayas to a tour of a Civil War battlefield.
STYLE The American attack can mutate into an increasing variety of forms, but the steady service of long balls from the flanks remains the favored tactic.
We use mental representation and language as new mechanisms of inheritance and modification that apply to an increasing variety of biological and non-biological entities.
Microarray analysis provides the ability to obtain gene expression data on thousands of gene targets in parallel and is being applied to an increasing variety of neurobiological samples.
Use of extracorporeal membrane oxygenation (ECMO), one of an increasing variety of mechanical circulatory support strategies, was first used close to 50 years ago.
In particular, impaired activities of members of the SWI/SNF chromatin remodeling complex have appeared in an increasing variety of tumors.
