Representatives from Facebook, Instagram, Snapchat and TikTok were absent from a parliamentary inquiry into the under-16 social media ban, despite them meeting with the government this week.
A Parliamentary committee will look to exercise its powers to force the companies to appear and give evidence, a senator has suggested.
A public hearing was held on Monday as part of a Senate committee's inquiry into the government's upcoming ban on under-16s using social media and the online safety code for search engines.
In attendance were representatives from YouTube, Google and Microsoft.
Committee chair and Greens senator Sarah Hanson-Young told the committee that all major social media companies had been asked to attend.
"I just want to put on the record that we did also request that Meta,