I hope this can help someone else.
I needed Google meets and Google classroom for my children but they only have kindles and it wasn't on the amazon store.
I searched and found this www.google.com/amp/s/www.howtogeek.com/232726/how-to-install-the-google-play-store-on-your-amazon-fire-tablet/amp/
Once you have Google play you can download all the apps that regular android phones can have.
I also managed to get WhatsApp on the kindle by using a different sim in my phone for the confirmation code.