I would give as much supplemental food as possible for the next month....they are designed to gorge as much as possible...then fall off for a few weeks before the weather cools...so as much hydration as possible and as much food as they can consume....
I would refrain from calcium powder and focus more on calcium through the diet. Is there a specific reason you desire to include
Supplement instead of diet and natural sun exposure time?
If the tort associates you with food then what you describe is expected. If you are reaching into the enclosure and placing food and the tort gets in the habit of this thing that delivers food, it may then begin to do what you describe...and feed, well those can be wiggling toes or bright yummy...
I would also advise that you spend some time researching this species and all parts of its natural life cycle, which in this species, includes winter down time (hibernation).
Hermanns are a species that can and do brumate....so perhaps since the tort is outdoors now--it is catching some external/environmental triggers that is causing the appetite to change, activity may also change....some torts begin to do what they are drawn to do as they age....now, I am not...
I agree....when I look at the sugar content for each of the ingredients in the amounts indicated--that is alot of sugar content and the added salt, well, that is also questionable....then on top of the sugar & honey add of the baby food with that sugar content....now, some of us use and or do...
In addition to offering hydration which is important...that tort is underweight...which means likely poor diet--which will also contribute to pyramiding....so offer up as much food as the tort will eat...I also would plan to ATTEMPT to keep the tort awake during the winter vs letting it...
It is a tortoise....mud don't hurt. Just make sure there is a part of the space that is dry and warm so that the tort can go there to dry out and once that happens it will eventually work the mud off if it wants to :)