At the bottom of messages there are new icons. You can hide some of them in settings to get more space or if they are not yet supported.
https://storage.gra.cloud.ovh.net/v1/AUTH_91eb37814936490c95da7b85993cc2ff/tootfedilabapp/media_attachments/files/109/603/977/841/041/238/original/27f3f04976838014.jpg