OneSignal Supabase iOS Push Integration

I need an engineer who can wire up OneSignal push notifications end-to-end for my Lovable web app, which is wrapped as a native iOS build through Median. Users authenticate with email / password, Google,... (Budget: $30 - $250 USD, Jobs: Backend Development, Frontend Development, iOS Development, iPad, iPhone, JavaScript, Mobile App Development, Objective C, REST API, Supabase)