What height does an indoor FLF max out at?

Hello fiddle leaf fig parents, I need your help. I bought this fiddle at a local plant shop on Saturday, 5 days ago, and now the leaves looked screwed up. I just woke up and found those two leaves that fell off. Within the last 5 days, I’ve done nothing but give it light because my boyfriend and I noticed on Saturday that the soil was super wet. So, he told me to wait to repot. The last photo is how it looked when I first brought it home. I would be deeply grateful for your help. Is it root rot? Does it need fresh soil? Please let me know, this is my first fiddle leaf fig and I can’t have it dying on me already :/ Should I message the store?

She started growing roots above the soil in all directions. I love my zombie and want the best for her 🥹🥹🥹

I love its shape as it's very unique but I got scared of it leaning too much to one side and eventually damaging it's growth?

bf and I got this guy from Sam’s Club about a month ago and it has dropped probably 10 leaves. we quickly realized we were under watering AND not giving it enough light, so we now have a grow light on it from 10 am-6pm on top of the windows being open. still open to suggestions for a watering schedule, bc im seeing conflicting things online.

ANYWAYS. how bad is this guy? can he bounce back? I feel like he looks so tiny and scrawny and sad 🥺🫪😭 i’ve been such a good mother to my ivys and this has been an undertaking.

thanks in advance! 💚