ERC-721 metadata not displaying despite correct metadata returning on .tokenURI() call

Smart Contracts
1

Metadata isn't showing up for my ERC-721, yet await contract.tokenURI(<id>) returns correctly formatted JSON.

Token Contract:

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract FollowNFT is ERC721URIStorage, Ownable {
    uint public id = 1;

    constructor() ERC721("SocialLinks NFT","SOCIAL") {}

    function follow (address _address, string calldata metadata) public onlyOwner {
        _mint(_address, id);

        _setTokenURI(id, metadata);

        id++;
    }

    function changeMetadata (
        uint nft_id, 
        string calldata new_metadata
        ) public onlyOwner {

        _setTokenURI(
            nft_id, 
            new_metadata
        );
    }
}

Metadata arg:

let metadata = {
    "description": "Tester", 
    "image": "https://upload.wikimedia.org/wikipedia/commons/3/3a/Head_skull_anterior_view.jpg", 
    "name": "Ryan",
}
metadata = JSON.stringify(metadata)

Result of await NFTConract.tokenURI('2'):

{"description":"Tester","image":"https://upload.wikimedia.org/wikipedia/commons/3/3a/Head_skull_anterior_view.jpg","name":"Ryan"}

And here it is on OpenSea