Atheism is a Belief System: True or False?

https://www.equip.org/articles/atheism-and-the-burden-of-proof/
https://www.atheists.org/activism/resources/about-atheism/

I recently came across some content on Youtube from a Christian apologist named John Lennox where he is debating a well known atheist philosopher named Peter Singer:
https://www.youtube.com/shorts/-OZfl-f0_Ko

The question of whether Atheism is a belief system is a hotly debated topic. I had no idea. The thing that jumps out at me about it is the question of the burden of proof and whether you require evidence for your position as a theist or atheist. Please read the articles above, and view the short video of John and Peter above and come ready for some great conversation! thanks Harriet