Can dermal fillers be placed in the temples and above the eyebrows to correct a droopy eyelid?

You can definitely get fillers to lift the brow. Fillers in the temples and brow area can be done with short acting ones which are hyaluronic acid based or more long lasting like fat. 

Thank you for your question. You submitted your question without a photo, asking if due to significant volume loss that you have one eyelid drooping more than the other. You assume it is due partially to volume loss. You’re asking if temple and brow fillers can lift the eyelid, and if fillers are placed above the brow.
In the absence of a submitted photo, it is difficult to ascertain whether the terminology you are using is the same as would be used by a professional. It is important to distinguish, when you use the term drooping, it’s been my experience that some patients mean the skin overlying the eyelid, while others mean the eyelid margin in relationship to the center of the eye known as the pupil.
When there is excess weight over the eye, or excess skin or fullness, then that is tissue that could be modified through different methods such as volume augmentation. What you are describing is consistent with a procedure such as what we would do in our practice for patients who have drooping eyebrows. Fillers can be placed at the temples as well as above the brow. If you have the eyelid margin drooping in front of the pupil, and obstructing part of the pupil, then that condition can be called ptosis. That’s where the pupil is being affected because the eyelid position is affecting the vision, and the position of the eyelid is usually caused by a condition affecting the muscle that lifts the eyelid called the levator muscle.  
It’s important for you to meet with qualified, experienced doctors who can perform a proper examination. As you have asked about a drooping eyelid, it would be worthwhile to seek an oculofacial plastic and reconstructive surgeon for a proper examination of the eye area so you can have a proper diagnosis. Thank you for your question.