The phrase "are increasingly more complex" is correct and usable in written English.
It can be used to describe a situation or subject that is becoming progressively more complicated over time.
Example: "The challenges we face in modern technology are increasingly more complex, requiring innovative solutions."
Alternatives: "becoming progressively more complex" or "growing more complex over time."
Because those devices are increasingly more complex, the upgrade process is more complex".
Moreover, today's systems are increasingly more complex, distributed, decentralized, etc. and therefore have to reason about and cope with more and more unpredictable events.
Today's leaders face challenges that are increasingly more complex and therefore, more difficult to solve.
There are increasingly more complex elaborations of AV within clubs, such as 3D projection mapping and video, with increasing creative input from DJs and producers.
"The U.S. is facing a security environment in Africa that is increasingly more complex and therefore more dangerous," said Michael R. Shurkin, a former Central Intelligence Agency analyst who is now at the RAND Corporation.
America must continue to provide leadership in the world which is increasingly more complex and dangerous.
These ethical, legal, and social issues are becoming increasingly more complex as new genetic and molecular techniques are used to study environmental toxicants and their potential influence on human and ecologic health.
Educational interventions are becoming increasingly more complex, far-reaching, and high-stakes.
Power system operation models are becoming increasingly more complex, as their capabilities improve.
Products are becoming increasingly more complex and intelligent, which requires users to participate in the design process in order to meet customer demands and enhance market competition.
Therapeutic education contributes to give significance to the diabetes treatment which is becoming increasingly more complex.
