How Do I Enter a Long Complicated Password Manually?

I use 1Password to manage and generate safe passwords (long, complex with special characters).
But here is the problem. After installing a MacOS update on my MacBook Pro, I’m presented with a screen asking for my Apple ID password, but I don’t have access to 1Password on the machine, so there is no way for me to copy-paste it in.
Fortunately, I have an iMac, so I open 1Password there and I can see the password. I try to copy the password manually on the MacBook, but since I’m not seeing what I’m typing (just dots), and I can’t find the special characters on the keyboard, I always get it wrong. Last time it happened, after many attempts, I had to resort to changing my Apple ID to something simple that I could enter manually to log in to my MacBook Pro. I find it kind of defeats the purpose. I like having complex passwords for security, but how do I enter those passwords when I don’t have access to the password manager?
Do you have any tips to deal with this type of situation?
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Jean-Claude