If you already had your online interview could you please share how it looked and what questions were asked?
Also what are we supposed to prepare for the online interview?
IRCC has been kind of changing the workflow of the 'Citizenship Interview'. Now, they simply request all pages of all the passports that were valid during the 5 year eligibility period via email without scheduling a MS Teams interview session (several people have been reporting this change in the past couple of weeks).
Generally, if you are invited for an interview, you are expected to have the originals of all the documents you submitted during your citizenship application. For the most part, the interview is simply to check your passport pages for stamps and verify if you have truthfully disclosed about the trips outside of Canada in your physical presence calculator.