From the article, it’s likely because they live and work in lower income areas:
He said it’s hard to give one reason why Southeast Asians are feeling the brunt of this hate, but he thinks financial status might play a role. A 2020 report by the Southeast Asia Resource Action Center said that all Southeast Asian ethnic groups have a lower per capita income than the average in the U.S.
“It depends on socioeconomics,” Chen said. “Where these people are living, where they’re commuting, where they’re working. That may be a factor as well.”