Hi Cory,
thank you for the advice.
In fact, the probe is on the ground of the terrarium, on the right side of the fauna box.
But, you are right, even like this, I increased the temperature on the Thermo Control Pro 2 to 29°C, because, in the fauna box, there is 1°C to 3°C less. Then, I get 26°C to 28°C in the fauna box, which is correct.
Appetite seems ok, just the tong feeding which must be learned to the frog...
My former cranwelli (RIP) was eating everything, with the tong or not, and with a feeding response of less than 2 seconds for each meal at each prey...
But all frogs are different

Here are 2 feeding videos :