First, you said your dogs are 7 months old. Then you said your male "is a typical boxer in every way". Next you said your male "is lazy and likes to sleep" while observing that your female has alot of energy, is getting into things, busys herself by chewing things that are left out, and in general, gets into mischief when unsupervised.
It sounds to me as if it's your female that is the "typical" 7 month old Boxer and that your male is the unusual one. Consider yourself lucky--you could have wound up with two dogs like your female.
At 7 months old, I would say you are probably giving her too much freedom. Maybe your male can be trusted, but your female is a different dog and you are doing her a disservice expecting her to behave just like him--especially since all the distructive stuff she is doing is completely expected from a pup her age. They are still puppies. Your house still needs to be puppy-proofed. Your daughter's things shouldn't be left out where the dogs can get them, period. This is just managing the environment, but it is the essential first step. It stops her from practicing the behavior and saves you lots of $$ in damaged stuff. The next step is to give her lots of acceptable, alternative outlets for that puppy energy. Maybe your male is content to lay around and sleep, but you female obviously needs more. Give her that extra brisk walk daily, play a rousing game of tug in the yard with her, do some trick training to tire out her puppy brain.
Even if their teething is done, most pups still like to chew--it just stinks when it's our stuff they are chewing. The key is to give her plenty of appropriate, interesting things she can chew. Chewing is a great way for them to expend excess energy and a wonderful way to keep them occupied when you can't keep full attention on them. Invest in some puzzle toys that can be stuffed with treats. Canine Genius, Kong, Buster Ball all make good, durable, stuffable toys that will keep her occupied for a long while--even longer if you fill them with a moistened mixture and freeze them. If you don't want to be giving additional treats, just moisten a portion her daily amount of kibble, or add plain yogurt to it and stuff that in the toys and freeze them. I guarantee she will love them and they will occupy her long enough so that you can leave the room to do the laundry or whatever.
As far as the eating poop, the only true way to prevent it is to pick it up before she can get to it. That might mean going out with her and scooping as soon as she has done it--every time. There are various commercial products as well as home remedies that claim to make the poop taste bad to the dog, all have varied success but may be worth a try if you absolutely can't get out there to scoop. If you can break the poop eating cycle by scooping before she has a chance to eat it, chances are she will outgrow it.
Housebreaking takes different amounts of time for different dogs. Again, just because your male has the hang of it, don't assume that your female will have the same schedule, or the same bladder control at the same age that he does. First, contact your vet and discuss the possibility that there could be a health reason for her urinating in the house. Mention that she has recently started eating her poop as well. Maybe she has a urinary infection or something else that would cause a weak bladder. Once that is ruled out, you need to go all the way back to basics. Pretend she is an 8-week old puppy and take her out on leash every hour and just after meals and when she wakes from a nap. If you previously used a crate, go back to it. Make sure you keep her meals to a set schedule so you can better predict when she will need to eliminate. Take the dogs out seperately so that she isn't distracted when she should be getting down to the business of eliminating.
Could it be that she is trying to signal you but isn't getting noticed? Some dogs will just sit patiently and not make a sound to let you know, while others will scratch or whine at the door. Keep her tethered to you if possible or gated in the same room with you so you can watch for more subtle signs: restlessness, sudden stop in play to go sniffing, sniffing or standing by the door, pacing, etc. She may show no obvious signs but rather has just not learned how to alert you. Consider training her to ring a bell hung from the door knob to go out. Alot of dogs get the hang of housetraining faster if they play an active part in the process and are given a clear method of alerting you.
I hope some of this helps. It does sure sound like you have your hands full with those pups. I'm sure the hard work you're putting in now will pay off in the end--twice the Boxer wiggles and kisses. Good luck.
Kim