I just wanted to make sure that you got a Digital Probe Thermometer for her finally, I'm sure that most of the issue was a combo of a lack of
UVB light from it being blocked by the mesh lid and too far away from her (a T5 UVB tube must be within 11" of her, a T8 must be within 6" of her and unobstructed by anything at all, the T8 tubes are very weak), and then not having any thermometer at all is very dangerous with a Bearded Dragon, whether the 3 temperature zones be too high or too low, it will effect every bodily function, including absorbing any nutrition at all.
BASKING SPOT SURFACE TEMP: Between 105-110 degrees F max for a baby/juvenile up to a year or so old; between 100-105 degrees max for a year old adult and older
HOT SIDE AMBIENT (AIR) TEMP: Between 88-93 degrees F max
COOL SIDE AMBIENT (AIR) TEMP: Between 75-80 degrees F max
****Please set the Probe from the Digital Probe Thermometer directly on the Basking Spot/Platform that is within the Hot Side of the tank and that is located directly underneath both the UVB tube and the bright-white colored basking bulb, and allow it to sit there for at least 20-30 minutes before reading the temp. Then, using the suction cup that comes with the Probe Thermometer, put it on the wire right below the Probe, and then stick it to the glass of the tank on the Hot Side, about 2" above the floor of the tank, wait 20-30 minutes, then read it...Then move it to the glass on the Cool Side of the tank, about 2" above the floor, wait 20-30 minutes, and read the temp.
You can make minor temperature adjustments by raising or lowering ONLY THE BASKING LIGHT closer to the basking spot or further away. If the temps are off by more than 10 degrees, then you'll need to go to a higher or lower wattage of bright-white colored basking bulb or regular, Halogen Indoor Flood bulb, like you buy at Lowes or Tractor Supply
****Bearded Dragons need their tanks to be both Pitch-Black and considerably cooler at night than their daytime temperatures in order for them to sleep soundly and comfortably, just like the Australian Desert they come from is. Any lights on at all at night or temperatures that are not cooler then their daytime temps with keep them awake, which will cause health and appetite/lethargy issues. AS LONG AS HER TANK IS AT 65 DEGREES OR WARMER AT NIGHT, SHE NEEDS ABSOLUTELY NO NIGHTTIME HEAT SOURCE AT ALL, AS THAT'S ABOUT THE TEMP THAT THEY LIKE IT. Most home are kept above 60 degrees at night, and if so then she's fine at night and needs no nighttime heat source at all. If for whatever reason your house is 60 degrees or colder at nighttime, which I doubt, then you'll need to get a Ceramic Heat Emitter (CHE), very, very low wattage, that emits only heat and no light at all. Realize that you're only trying to bump the nighttime temp up between 65-70 degrees, so a very low wattage CHE is all you need, though most people need no nighttime heat source at all, unless their dragon is sick or injured and needs the tank warmer than normal for an immune system boost.