Tabs Appeared and disappeared on Brave mobile phone app

Hello,

While I’m using the Brave app on my mobile phone, all my tabs have disappeared. After a few weeks and opening about 35 tabs, they were replaced with the tabs I thought were lost.

Is there a feature to have multiple windows on the phone that would explain why my mobile app switches between them? If so, how can I use it correctly?

Thank you,

Sinalger