Build Wa Bulk system in Playstore

can anyone make something like this
if we can make a cooperation agreement in france in writing via digital freelance

please look first for the features
example : https://play.google.com/store/apps/details?id=com.invotech.whatspromo&hl=id&gl=US

the app will be linked to playstore
with the main admin panel system which can manage the access rights of all systems. Besides that, the application can also provide reseller admin panel access rights which the main admin can set for a limited number of activations

for unit buyers, you can try using the demo first by logging in using a phone number and will get an OTP code with a specified limit and can be set by the admin panel

for full use, you can choose a 1 year and 3 year subscription package, where the user can buy the package directly and connect to the payment gateway

Buyers can also become referral affiliates to sell the application to their friends and get a commission for every 1 sale. and they can withdraw the results with a minimum sales limit.