Is there a way to open multiple websites in a single Chrome browser tab?

We are aiming to open both Wikipedia and Google Docs in a single Chrome browser tab. We initially managed to make it work with an implementation similar to iFrames.

We would expect this to enable access to both websites through a single browser tab and have been able to get it to work without being blocked by the websites themselves. However we are met with a Chrome warning stating "deceptive site ahead", and we believe this is triggered by a violation of the CORS policy to protect people from phishing scams. We have a totally legit use case and we are definitely not trying to do anything like that.

We are getting this error message from Chrome.

Does anyone know any potential work arounds for this issue that would avoid violating any security policies? Or is it possible to get whitelisted by Google if you can provide evidence showing you are legitimate? Or is there a different approach all together that anyone could recommend to solve the problem of opening multiple sites in a single tab?

We are a little lost on how to progress so any suggestions would be very much appreciated!