Is there a reason why generic emojis that can be accessed from keyboards nowadays via either phones or Windows don't work here? ��*♂️

Can they be made to work? ��

EDIT: Hmm it didn't work when I tried in a post previously so I deleted it. Tried now, and it sort of worked but the shrugging shoulders emoji I put up has changed colour and had an asterisk and male symbol I didn't type added afterwards.
EDIT 2: And now they're gone completely and been replaced by double question marks in diamonds which is what I saw previously.