TrainReservation markup has no effect on the email - google-schemas

Question

We are trying to integrate TrainReservation schemas in our emails, like what we did for FlightReservation before. I've tried sending a test email to myself (using google scripts) along with the following schema:
<script type="application/ld+json">
[
{
"#context": "http://schema.org",
"#type": "TrainReservation",
"reservationNumber": "175091993",
"reservationStatus": "http://schema.org/ReservationConfirmed",
"cancelReservationUrl": "https://test.com/cancel?id=AB3XY2",
"underName": {
"#type": "Person",
"name": "Test Test"
},
"reservationFor": {
"#type": "TrainTrip",
"departureStation": {
"#type": "TrainStation",
"name": "Foo"
},
"departureTime": "2021-09-21T15:15:00+04:30",
"arrivalStation": {
"#type": "TrainStation",
"name": "Bar"
},
"arrivalTime": "2021-09-21T19:55:00+04:30",
"trainNumber": "282"
},
"reservedTicket": {
"#type": "Ticket",
"underName": "Test Test",
"ticketNumber": "175091993",
"additionalTicketText": "Some text"
}
}
]
</script>
The schema is successfully tested using the markup tester. However, in the received email, I do not see any special thing, unlike FlightReservation markups that show the itinerary data at the top of the email, adds it to the calendar automatically and has action buttons for cancellation and modification.
So I'm wondering, am I doing something wrong, or is this just the normal behavior? What features do I have to expect from TrainReservation markups for the receivers of emails? (and also please answer that for BusReservation markups as well)

Answer 1

Appreciate this question is almost a year old, but it appeared when I Googled "TrainReservation" and "Schema" and didn't have any answers. Somebody asked it 6 years ago here, and it looks like as of August 2022 the TrainReservation type is not supported in Google Schema - you can find a list of supported schema types here, which currently only includes:
Events
Flights
Hotels
Restaurants
They haven't included car hire, but that does also seem to work in my experience.
I suppose all we can do is wait for Google to eventually implement TrainReservation and BusReservation as types. Very frustrating!