What we need:

• solcJS (compliling solidity code with javascript)
• react native code editor
• React Native Context
• web3 modal

Test code: // SPDX-License-Identifier: MIT pragma solidity ^0.8.0;

contract HelloWorld { string public greeting;

constructor() {
    greeting = "Hello, World!!";
}

function getGreeting() public view returns (string memory) {
    return greeting;
}

function setGreeting(string memory _greeting) public {
    greeting = _greeting;
}

}