The comma and semicolon are missing from the keyboard of my iphone se3. How do I get them back?

Have you press the 123-key?

Tap ⤵️

But I realized they are only missing when the cursor is in the “To” section of an email where you must use the blue + symbol for additional addresses. You can’t separate them with a comma or semicolon so those aren’t present.

Ah, OK.

In the TO field, add an email address of the first recipient.

Then tap the blue + sign.

Find the email address of the 2nd recipient, tap on it.

You don't have to put down the comma or semicolon, that happens automatically that those addresses are placed separately.

Just tap the blue + sign at each additional address you want to add.