General body awareness never "clicks." It's built with practice gradually over time. As they get older, it often becomes easier to build it, and the ease with which any particular kid builds it at any particular age varies widely.
But while general body awareness is something gradually acquired with practice over time, specific aspects can be practiced, and in many cases they can be practiced easily at home. But before I get to what those drills are, let me heavily emphasize this: she should only do drills at home when/if she feels like it. Do not pressure her IN ANY WAY to do these drills; it is of absolute paramount importance that the drive to do gymnastics at home comes ONLY from the athlete, and not from the parents -- this is true at any age, but is especially important at a young age. You don't want her to ever think of gymnastics as a chore that you're making her do.
Anyway, for leg tightness and toe point in particular, here are a few easy at-home drills:
1) Sit on a chair or couch with the legs straight and toes pointed. Do this without the legs supported past the knees; in other words, from her knees down should be off the edge of the chair or couch, so they only stay up if she's keeping her legs straight
2) Same as above, but lightly push down on her feet. The idea is that you're trying to make her knees bend, and she has to fight to them straight. A short time -- say, 10 or 15 seconds -- is plenty. If she's feeling adventurous, though, you can make a game of it. How long can she keep her legs straight while you're pushing down on her feet? The idea is for her to understand that it's not enough to hope for her legs to be straight by coincidence; she has to keep muscle tension to keep them straight.
3) Same as #1, but while she has something else to think about. She can read (or you can read to her), or she can watch TV, or she can solve a tabletop puzzle, or whatever else 5-year-olds do to entertain themselves while sitting in one place. I'm not a parent, just a coach, so I'll leave it to you to figure out what activities will work for this, but the idea is for her to practice keeping her legs straight and toes pointed while focusing on other things.
But honestly I wouldn't worry about it too much at 5 years old. The more she does gymnastics and the older she gets, the better her body awareness will become.
And let me emphasize one more time: DO NOT UNDER ANY CIRCUMSTANCES PRESSURE HER TO PRACTICE AT HOME. Not even passively (like by asking whether or not she's been practicing). If she comes to see gymnastics as a chore, her odds of sticking with it drop like a stone, as will the amount of effort she puts in both at home and in practice.