Just to make sure I understand. Do you want to use your YubiKey as an additional 2FA authenticator to access 1Password?
FWIW, I use both of these products and adding the YubiKey, for this purpose, is relatively simple.
Ref: https://youtu.be/wv9qzPhexfU
If, on the other hand, you are asking can you integrate 3rd-party authenticator apps with 1Password, the answer in most cases, is maybe.
Here's how I have done this ...
- Using a web browser, access the account that you want to enable 2FA on.
- Follow the account's process to add 2FA.
- When asked to select an authenticator app, opt for either the manual or key entry method.
- Copy the secret key after it is generated.
- Edit the account's entry in 1Password. Create a new field, labeled: "One-Time Password"
- Past the secret key into this field.
- Save the entry.
1Password should know generate 2FA codes for this account. Don't forget to use the current code (the one you just copied) to complete the verification process on the service's website.