At this time it is only possible to send a ‘new’ email from the Monday.com mobile app. If replying to a specific email it is only possible on the desktop version, which is not always accessible when replying to an email. App switching makes the mobile app redundant for emailing. Replying to every email as a ‘new’ email is confusing and frustrating for the recipient of an email from the monday.com app.
That’s a great suggestion! Have you put it on the feature suggestion board? Feature requests - monday Community Forum