"as a backdrop of" is a correct and usable phrase in written English.
It is typically used to describe the background or setting of a particular event or situation. For example, "The city's skyline served as a beautiful backdrop of the couple's wedding ceremony," or "The historical context of the novel serves as a backdrop of the author's main themes." It can also be used in a more abstract sense, such as "The moral dilemma served as a backdrop of the character's internal struggle."
The economic outlook for the UK has "deteriorated", Carney said, as a backdrop of uncertainty takes its toll.
Reporters watched his charter plane touch down on the island, as a backdrop of four flags — two American and two Puerto Rican — rippled in the wind behind a podium that had been set up for him.
Faust stands alone on the stage, as a backdrop of the nocturnal heavens splits apart, leaving a stage-high segment of Helen's face, an intriguing image of a classically beautiful eye and nose and cheek.
People who see the city as a backdrop of fashion plates against which they can strike physical and intellectual attitudes, or those for whom urbanism is just another wanky trend?
In more recent years it has served as a backdrop of a number of films and TV dramas.
In the essay, Cole takes aim at the long history of Americans using Africa as "a backdrop for white fantasies of conquest and heroism".
The Welsh government said it was trying to be as fair as possible against a backdrop of drastic budget cuts.
The articles generated by the competition are often set as much against a backdrop of inaction as action – the stagnation of mass unemployment, the isolation of people with mental or physical disabilities, or the grinding boredom of a refugee camp.
Characters of varying degrees of eccentricity age as gracefully as they can against a backdrop of gentrification and disturbing social change.
I decide to have lunch at the Kings Oak Hotel, in the heart of Epping Forest, which has featured as a backdrop to some of the show's more dramatic scenes.
Thus the graphically expressed itinerary serves as a backdrop for consideration of the individual's place in the broader scheme of things.
