If your iCloud backup is still available and you know your Apple ID credentials, you can use Samsung's Smart Switch app to transfer data.
Install Smart Switch on Samsung: Open the Smart Switch app on your Samsung phone > If not pre-installed, download it from the Google Play Store.
Choose iPhone Option: Select "iPhone/iPad" and choose to transfer wirelessly > Sign in to your iCloud account when prompted.
Select Data to Transfer: Once connected, Smart Switch will allow you to transfer available data like contacts, messages, call logs, and photos from iCloud.
Transfer: Follow the on-screen prompts to complete the transfer of your iCloud data to your Samsung phone.
If your contacts and calendar were synced with your Google account on your iPhone:
Add Google Account: On your Samsung phone, go to Settings > Accounts and backup > Manage accounts > Add account > Google > Log in using your Google account > Sync Contacts and Calendar > Enable sync for contacts, calendars, and any other desired data, and it will automatically appear on your Samsung phone.
