What client are you using? We do have custom emoji, but the default lemmy interface doesn't do emoji auto suggest like that
web interface, using Firefox (i.e. I just go to https://lemmy.blahaj.zone/, login, and browse - no special client or extensions)
EDIT: also, thank you ❤️
Ah, ok, I found the emoji auto complete. It doesn't look to be something we can alter. You can use a different front end though (see links in the instance sidebar). They will have different behaviours for emoji
thank you for checking!! maybe if I get the gumption to, I can make a pull request ta add a user setting to disable the custom emojis in the autocomplete 😄