As indicated it sounds constipated. Usual cause is insufficient hydration.
You can very gently palpate the ventral surface in front of the vent to see if you can feel any hard lumps of faecal matter.
Get it to drink water if you can. Or use dropper. Up to 5mL a couple of times a day. This better that administering oils at this stage.
The bath should be tepid i.e. just warm to the touch (approx. 40oC). Gently lift the tail up so that the vent is open and water can enter the cloaca and rectum where the faecal matter is. This will allow it to absorb moisture and soften so that the lizard can then pass it. I would look at 30 mins twice a day for a couple of days. Still no result after that I’d involve a vet.