@chicka: Have you registered the same Samsung and Google accounts to your new S24+? If so, please open the Calendar app > Tap the 3 lines in the top left > Manage calendars > Make sure that the relevant accounts are toggled on > Back > Tap the 3 lines once again > Sync now > Swipe from the top of the screen to the bottom, then again to enlarge the Quick Panel > Make sure that 'Sync' is enabled.
If this doesn't work, and if you have access to your S20+, you can head to Settings > Accounts and backup > Samsung Cloud > Backup data > Calendar (toggle this on) > Back up now, then follow the steps above on your new device. Alternatively, tap on 'Transfer data for device setup' and follow the on-screen instructions.
Emails are stored on your providers servers, and can be synced to your new phone by registering your account via a compatible Email app. I recommend using a dedicated app where possible, or Gmail > Tap your profile in the top right > Add another account.
