How do I prevent unicode heart from become ❤️ when posting?

[supermathie (Michael Brown)]

You could use escape it with backticks: ♡

I do recognise it’s a bit annoying when it autoconverts

♢ ♤ ♧

♠ ♡ ♢ ♣ ♤ ♥ ♦ ♧