Hello Ashcakes143,
You can send Memoji using the steps below:
Send Memoji and Memoji stickers
Messages automatically generates sticker packs based on your Memoji and Memoji characters. You can use stickers to express a range of emotions in new ways.
1. In a conversation, tap
.
2. Tap a Memoji in the top row to view the stickers in the sticker pack.
3. To send a sticker do one of the following:
• Tap the sticker to add it to the message bubble. Add a comment if you want, then tap
to send.
• Touch and hold a sticker, then drag it on top of a message in the conversation. The sticker is sent automatically when you add it to the message.
Send animated Memoji or Memoji recordings
On supported models you can send Memoji messages that use your voice and mirror your facial expressions.

1. In a conversation, tap
, then choose a Memoji.
2. Tap
to record your facial expressions and voice. Tap the red square to stop recording.
Tap Replay to review your message.
3. Tap
to send your message or
to cancel.
You can also find those steps in this resource: Use Memoji in Messages on iPhone - Apple Support
Should you need any further assistance with that feature, you'll want to reach out to Apple Support so they can look into your particular situation further: Contact - Official Apple Support
Take care.