The phrase "are largely found" is correct and usable in written English.
It can be used when discussing the prevalence or common occurrence of something in a particular context or location.
Example: "These species are largely found in tropical rainforests, where the climate is ideal for their growth."
Alternatives: "are mostly located" or "are primarily seen".
Coniferous forests are largely found in the temperate climate of the Northern Hemisphere, where they cover approximately 1,100,000,000 hectares; some 85 percent of them are in North America and the erstwhile Soviet Union.
Despite the complaints of some old buffers about the programme's craving for street credibility, Newsnight realises that younger viewers are largely found on other platforms and is putting more content on social media.
Brits who buy organic wine are largely found in metro areas (especially London), and they are in the wealthier class.
Viewing that MA, MDMA and ketamine are largely found in locally seized ecstasy tablets, so these three active compounds are given emphasis for drink spiking in this study.
Hydrothermal worms are deep sea creatures, almost as small as a bacterium, and are largely found near hydrothermal vents in the ocean.
Because such recurrence was highly unexpected, we investigated the possible relationship of tumor growth with fat injections and with mesenchymal stem/stromal cell like cells which are largely found in fatty tissue.
It is largely found in cell membranes, and there is a smaller amount circulating in the blood stream and stored inside cells.
Phytoferritin is observed in plastids (e.g., chloroplasts in leaves, amyloplasts in tubers and seeds), whereas animal ferritin is largely found in the cytoplasm.
Terrapene is largely found in cool to warm temperate regions east of the Rocky Mountains from southernmost Canada to the Gulf Coast of the United States and into Mexico.
