LEGO has released a statement regarding paid advertising on social media platforms. They did not outright state that is is in response to supporting the Facebook boycott from large brands but they do emphasize that they do want to have a positive, inclusive digital environment free from hate speech, discrimination and misinformation.

Social Media Paid Advertising Pause

We are committed to having a positive impact on children and the world they will inherit.
That includes contributing to a positive, inclusive digital environment free from hate speech, discrimination and misinformation.
We will take immediate steps to carefully review the standards we apply to advertising and engagement on global social media platforms. While we do that, we will pause all paid advertising on global social media platforms for at least 30 days.
We will not change our media investment during this period and instead, invest in other channels.
We will work to collaborate with our partners and take whatever steps are necessary to create a more trusted digital world for people today and future generations. We are confident solutions exist but urgent action is needed.

Julia Goldin, Chief Marketing Officer