Summer Glory — advice?

So, I bought this tiny half dead thing from the clearance plant section of a grocery store, with droopy leaves no bigger than my palm. The last photo is one of the smallest current leaves on her, and is bigger than the largest were when I got it. I remember saying out loud,"aww but look the leaves are so tiny!!". I had no idea what I'd just bought, the tag helpfully said "houseplant". I thought, well how big can it possibly get?

I've tried to ID it a couple of times, but failed until a friend asked me about my "rather large philodendron" 😂

I guess I'm doing something right, because about 18-ish months later she looks like this. But she's crawling out of her pot, and outgrowing the corner of the dining room that is the biggest space I have for it in the whole house. I live in 8b so she could spend her summers outside but it gets too cold here for her to be outside in the winter.

I saw someone else has posted about having theirs on a moss pole–is it possible to train one this big to do that? Is that a bad idea? Does anyone have any other ideas? Help?