I have tapocare premium up to 10 cameras but I need to add more cameras to the tapo app. Do I have to purchase new subscription? and if so, will they merge in the same TAPO APP or will I have to...

I have set up 10 cameras tapo C310 and I need the movement detection to make a different sound for each camera. I have seen a post from 3 years ago of someone who ask the same and he just got answer...