By Submitting Proposals to the Unicode Consortium: The Unicode Consortium is the organization that standardizes emojis. If you have a compelling idea for a widely useful emoji, you can go through their formal proposal process. This is a lengthy and rigorous process, and there's no guarantee of acceptance, but it's the official way new emojis are added to the global standard.
Or you can generate your own sticker instead, which is much easier.
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