Just having a secure password isn't enough. You must also activate a secondary method of authentication for any web service you are using. These are often referred to as 2FA and the application you will need will be using something known as TOTP. Enough with the initials, which may seem daunting, but using these tools is actually quite simple.
Most people are familiar with the practice of 2FA when they get a short code on their phone via text (SMS), which they then use to verify their authentication. But getting these codes via SMS is very insecure and the recommendation is to use an app that generates the 2FA code.
One common app would be Google's own Google Authenticator. Microsoft has it's own as well. I would recommend using the app andOTP. But if you are a BitWarden premium user, then it is built-in to BitWarden. Use it!