After researching this claim, I found that it is mostly true. Research shows that many kids are spending less time reading for fun, especially as they get older. At the same time, some studies show that kids still read for school, so the claim is mostly about reading for enjoyment rather than reading in general.
This survey looked at thousands of children and found that only about one in five children said they read every day in their free time. It also found that reading enjoyment has dropped compared with previous years.
This study looked at the actual reading behavior of more than 2,600 students. It found that girls generally spent more time reading than boys, especially outside of school, which shows that reading habits can be different depending on the student.
ITV News reported that children's enjoyment of reading had reached its lowest level since the survey started. The article also explained that phones, the internet, schoolwork, and other activities may be taking time away from reading.
This article explained the results of the National Literacy Trust survey and showed that only around 20% of children said they read daily in their free time. It also talked about how reading enjoyment has continued to decline over the years.