Comment by QuantumNomad_

> - For single-line text fields, pressing enter is an alias for submitting the form. - For multi-line text fields, pressing enter inserts a new line.

Web browsers have been like that by default for ages in text input (single line) vs textarea (multi line). Since way before smartphones even existed.

Regardless, many chat apps on the computer have what look like a multi line textarea but it will be anyone’s guess whether Enter will add a newline or submit in any particular one of them.