None of us realized how bad MVBs are initially. I used to use and recommend them. We learn as we go.
Sand should never be used for substrate. Its a serious impaction risk as well as a skin and eye irritant. Dirt can be okay doing on its composition. Coco coir is safe, but messy. Fine grade orchid bark works best for adult Russians.
Both of your enclosures are way too small. Each of them should be at least 4 times bigger. Minimum size for an indoor adult Russian tortoise table should be 4x8 feet. This might be a contributor to the beak and shell issue too, as small enclosures seem to go hand in hand with overgrown beaks and carapace growth anomalies.
Spring mix is not a good tortoise food, and Russians are not grass eaters, so the hay really serves no purpose.
I don't say these things to make you feel bad. I say them so you'll know what is wrong and how to fix it.
Give this a read. Diet, heating and lighting, substrate, enclosure size, and much more is explained. Questions are welcome.
I chose the title of this care sheet very carefully. Are there other ways to raise babies and care for adults? Yes. Yes there are, but those ways are not as good. What follows is the BEST way, according to 30 years of research and experimentation with hundreds of babies of many species. What is...tortoiseforum.org
Thanks for the advice. The write up was helpful. I can change her substrate out immediately indoor. Its good timing, as I was going to replace it this week. The feed advice I can do as well with a combination of upping my grocery store game and looking into growing some stuff. Unfortunately I cant expand her box by that much right now. I'm in an apartment. I got a tortoise without really knowing how much space they needed and expanded as much as I could once I learned better. The good news is I bought a house! We are closing on it now, so my first priority will be larger enclosures for poor Delilah. I'm lucky that its a big place with lots of indoor and outdoor room so I'm looking forward to Delilah finally getting her palace.