Scarlette - 2022 Colombian BCI

[Bogertophis]

I mean, she would just sit there. For hours. Her enclosure door is open? She doesn't move from her hide. I have a carpet who will definitely come out of his enclosure if is opened, he is always on the move and willing to explore. Same goes with another one of my boas. But, I have never seen this from Scarl, if I only handled her when she was out in the open or at the front of her enclosure, I would have never handled her in the entire time i've had her (besides from when she was first settling into her qt tub, but I wasn't handling in the first week I got her).
She's not hissing or striking, for that matter even tense when I am getting her from her enclosure or handling. She is calm when she's out, and seems to be comfortable in my presence.
So unless you mean more patient by waiting for days with her enclosure door open (which isn't even possible because I'd need to supervise it) then I don't know what else I can do.

It might BE because she knows you're there, watching. Snakes fear being preyed on when out in the open- many hold their ground & rely on camouflage to stay hidden when anything is nearby that might see them. OR, it's also because they are 'ambush-predators'- waiting for prey to come within reach.

Now, just to be clear, I'm not suggesting you leave the cage open, go away & not watch- that's a great way to have your snake truly disappear. But not all snakes are good at voluntary exploration. If you want a more adventurous snake, get a bull snake (or gopher, or pine snake- all very similar)-this is because they actively pursue prey and they're also diurnal & not very shy. Ditto for racers, or garter snakes, or most rat snakes. It's not quite fair to compare your BCI with Homebody's Children's python- they have very different personalities.