Here is a code that sends mail with details of user's appointment. But sometimes i don't get the mail from Resend. Does it has to do with my code structure or its resend's issue? I can't find something online with the same "issue". Any help? Thanks.

Code:

import { AppointmentEmail } from "@/react-email-starter/emails/create-email";
import { AppointmentGREmail } from "@/react-email-starter/emails/create-gr-email";

import { Resend } from "resend"
import{render} from "@react-email/render"

const resend = new Resend(process.env.RESEND_API_KEY);


export const sendEmail = async (
    clientName: string,
    clientEmail: string,
    serviceName: string,
    servicePrice: number,
    barber: string, 
    day: Date, 
    time: string,
    lang: string
) => {

    if(lang === "gr") {
        
        await resend.emails.send({
            from: "mail@Test.gr",
            to: clientEmail,
            subject: "Το ραντεβού σας στο Test",
            html:render(AppointmentGREmail(clientName, clientEmail, serviceName, servicePrice, barber, day, time))
        });
    } else {
    await resend.emails.send({
        from: "mail@Test.gr",
        to: clientEmail,
        subject: "Your Appointment at Test",
        html:render(AppointmentEmail(clientName, clientEmail, serviceName, servicePrice, barber, day, time))
    });
}
};