Stop Private Tabs From Closing Automatically

I just made the switch to Brave yesterday and was very sad when the private tabs I had up closed themselves after sitting unattended for a few hours. I couldn’t find anything in the settings to turn this feature off-- and I would very much like to turn it off.

I’d actually like to be able to give private tabs staying power, to be able to stay even if my phone was restarted or if Brave was closed and reopened. If this isn’t possible, at the very least I don’t want private tabs closing unexpectedly and without permission. I use private tabs regularly and like to keep them for weeks at a time sometimes, private tabs closing themselves is a deal breaker for me.