Based on the specs I see of your phone, I'm pretty sure it should be enough to run the game. Just to make sure, go into the options and make sure you're using the low res settings (though I believe that should be default on phones).
Looking at your comment I also see that you played the game a very long time ago, if you're reusing an old save, I strongly recommend starting a fresh game if your save is older than august 2025 or you're going to run into a lot of bugs.
As for the animations with Cervius, those were not removed from the game and instead moved to the pleasure room where they can be unlocked to then be used in the Stage Performance minigame. We made that change so we could have more freedom with the animations and also make it so it's faster to do the battles.