Why does orbiter finance only let me swap half of my eth from arbitrum nova to eth main network?

UPDATE (solved): I just decided to use a different conversion service that takes 7 days but has a way better rate. I’ll have to wait a while but it allowed me to move all of it at once

I am not very knowledgeable about crypto and how these services work, I only have a little bit from Reddit community points that I turned into eth a while ago. I want to switch the network from arbitrum nova to the ethereum main network so I can actually use my crypto instead of it sitting in my account. I can’t cash it out because of age requirements, so my best bet is to spend it. I already know what I am going to use it on.

I have my wallet in the metamask app, and I accessed orbiter finance through the web browser and connected my metamask wallet to the website. When I click on the maximum option to swap my eth to the main network, it only allows me to select half of my balance and says I have insufficient funds when I enter my full balance. Is there a way to stop this and transfer all of it at once? I don’t want to have to pay additional fees multiple times