The phrase "also manifested itself" is correct and usable in written English.
It can be used to indicate that something has appeared or become evident in addition to other previously mentioned aspects or phenomena.
Example: "The issue of climate change also manifested itself in the form of extreme weather patterns."
Alternatives: "also emerged" or "also became apparent".
Modernisme also manifested itself in Catalan drama at the turn of the 20th century.
This pattern isn't new — it also manifested itself in Michigan — but Ohio has slightly more Catholic voters than Michigan does.
But Balanchine's love for things American also manifested itself in a much more mundane savoring of the minutiae of everyday American life.
This "othering" of Muslims has also manifested itself in a growth in hate crime: a 70% rise in the past year according to the Metropolitan police.
This bullying behavior also manifested itself in Weinstein's creative choices as a producer and distributor of movies: his oppressive approach with filmmakers though in no way morally equivalent to his monstrous attacks on women had negative effects on the movie world of his times.
This feeling also manifested itself in 1991 in the trial of two peace activists, Pat Pottle and Michael Randle, who helped the Soviet spy, George Blake, escape from Wormwood Scrubs in 1966 because they felt that his 42-year sentence was excessive.
Sarah's also manifests itself through art.
That singularity also manifests itself on the court.
That contrarian approach also manifests itself in efforts to let employees have a life outside the office.
We tend to think of ambition operating in terms of some ultimate destination – the Nobel Prize or bust! – but it also manifests itself incrementally, at the level of pettiness.
This eclecticism also manifests itself in Jakwob's DJ sets, which take in dub, hip-hop, drum'n'bass, dubstep and beyond".
