I would ditch iOS or Android in a heartbeat.
There's a huge market for this.
We adopted these phones because they were revolutionary devices that made our lives faster and more efficient.
But then they started spying on us and selling us as a product to advertisers and governments.
Now the two companies that control well over 99% of the smartphone operating system market have become religious zealots that use their platform and money to silence those they disagree with by banning them from modern life.
If you make something that doesn't spy on me and lets people communicate without the rainbow wokeness, you've got a huge market willing to pay for something new!