The Streisand effect tends to happen when a secret is made public and then there's an effort to bury that secret. So I would say there's absolutely been a Streisand effect here, but just in the other direction. You can find countless videos like this [1], where a parent simply reads from books made available by a school, at a school board meeting. School boards largely responded by simply trying to bury these things - enter, Streisand.

It's not a secret that books like these exist, you can find a million of them with a single search. But the fact that they were on school shelves is certainly something that came as a huge surprise to the overwhelming majority of parents.

[1] - https://twitter.com/gratefulAC19/status/1453174598380441603

Politicians studying history and modeling policy after Stalin. One book banned is a tragedy and news worthy, but banning dozens, hundreds, thousands of book with a common theme is a statistic and just a state's right issue.