1 week OOP 10-20 grams
2 weeks OOP 14-24 grams
3 weeks OOP 15-25 grams
4 weeks OOP 21-32 grams
5 weeks OOP 28-39 grams
6 weeks OOP 33-44 grams
7 weeks OOP 38-49 grams
8 weeks OOP 43-59 grams
This one is what I refer to, but remember it's just a "guideline" to get an average weight at that age. Weigh the joey regularly to make sure she is thriving
Also you may need to help her to the pouch for bed time sometimes, at her age she would still be riding on mom n dads back and or following them to the pouch. Without them there she may need some help until she goes to the pouch on her own. So if you see her sort of frozen on the floor when she should be in pouch don't freak just put her in the pouch or up to the pouch and let her climb in on her own.
I wouldn't put a heat lamp on or near the cage, just give her some extra fleece and maybe make some fleece pompoms for her to snuggle up with
you can use the pom pom later on to do scent swapping when she's big enough to introduce to other gliders.