I think she finally gave up trying to burrow all the way around the bottom, but she got close.
She also let me get a rare close-up full body shot.
Not really sure how much is needed if at all, but I've started to mist/pour a little water down the corners every couple of weeks or so. Her species is semi-arid so I figured some occasional "rainfall" wouldn't be a bad idea. I think she even specifically came out in the above pic to sip droplets, though I provide a water dish at all times of course, of which she's been surprisingly good at not filling with dirt. I hear all the time from other owners how their Ts constantly fill up water dishes with substrate, but she hasn't done it once even after she began to burrow.