Change the Password Passcode

I have an iPhone 11 that I store a lot of my account passwords on in the "passwords" option under "settings". The question I have is, is there a way to change this passcode? I can't find any articles/instructions on how to do this, if I look online I just find links to change my phone unlock passcode. The issue I'm having is, my password passcode and the security code for my phone are the same and I need to take my phone in for service and I will have to provide the security code for them to unlock my phone but I don't want them to have access to all my account passwords too... so is there a way to update/change just this so they are different?