How to access one Django Project Database from another Django Project?

Question

I am trying to access one Django Project Database value from another Django Project. So far I have tried making REST API on both the applications and it is working somewhat well on the local server. However, I am concerned that when I will be deploying both the projects on the server it will create some lag to access over the API. Moreover, if one server/application is down for maintenance, the other will be inaccessible.

Is it possible to directly access the other app database without using API as it will be much more faster and reliable?

Thanks.