The phrase "arguably require" is correct and usable in written English.
It can be used when discussing something that can be debated or is open to interpretation regarding its necessity.
Example: "The new regulations arguably require businesses to adopt more sustainable practices."
Alternatives: "possibly necessitate" or "may demand".
Effective adaptation to unprecedented future conditions will arguably require innovation, the successful diffusion of new ideas and technologies into markets and practice.
Its European equivalent would, arguably, require a new treaty, just as the European Central Bank did, and all the political horse-trading that would entail.
The $2.6 trillion muni market is the last bastion of mom-and-pop investors, who arguably require tougher regulatory protection than the institutional investors that dominate the stock and corporate bond markets.
Users arguably require more encouragement – or indeed obligation – to use them.
The high returns that many hedge funds provide arguably require investors to take on higher levels of risk.
And as recently noted by Josh Bersin, aside from a few highly-technical jobs, such as machine-learning engineer or data scientist, most of the highly sought-after roles of today arguably require more soft than hard skills (e.g., sales rep, customer success manager, brand partner, and marketing content manager).
The production of high quality effluent from membrane bioreactors (MBRs) arguably requires less supervision than conventional activated sludge (CAS) processes.
Batting arguably requires greater resources and intensity of coaching, I guess, which private schools offer more of, but it can't only be that.
QE was arguably required in 2009 to provide the banking sector with liquidity in the face of a frozen interbank lending market.
After a stint at Disney, where he proposed building a theme-park full of free-roaming robot dinosaurs, he turned his attention to building a mechanical clock that will run for 10,000 years, a task that arguably requires genius in its justification as well as its execution.
But intelligence arguably requires not only the ability to converse but the ability to integrate the content of language into the rest of one's psychology for example, to recognize objects and to engage in practical reasoning, modifying one's behaviour in the light of changes in one's beliefs and preferences.
