I believe it is fairly common knowledge that there are security and privacy concerns regards WhatsApp. The EFF, Ed Snowden, and many others, have expressed concern about the apps' integrity. You don't need to be a conspiracy nut or a guy with a tinfoil hat, in order to enjoy basic privacy.
I have been trying to delete the WhatsApp application from my phone and move my family, friends and even colleagues from WhatsApp onto a better alternative which is secure and privacy respecting. However, as you probably already know, WhatsApp is ingrained as a default messenger across the world and in many countries. Here in Spain, you can not survive without it. Teachers at school prefer to communicate with WhatsApp.
I have begin examining different options in order to be able to use WhatsApp whilst remaining as private and secure as possible. I even bought a phone specifically to "degooglize" it and install a hardened version of android called "grapheneos".
So far the best option seems to be to install WhatsApp on one of the user profiles to separate it from the main profile with all my contacts.
An alternative option could be to use WhatsApp through a bridge like matrix.
Does anyone have any other ideas on how to still use WhatsApp whilst making it as private as possible?