I'm assuming this is a DL.com glitch.
We originally had booked LGA-EYW and it was on an A220, but DL changed the departure and downgraded the aircraft to an E170 operated by Republic Air. Flight 5821 on 4/25.
However, ALL dl.com LGA-EYW flights for 5821 (non-stop) show no services. No drinks, no snacks, no meal, nothing. menu.delta.com gives an error.
I've called (don't trust the chat reps) and the rep had to get her supervisor and they were at a loss to explain why it shows no service, other than to say "it's operated by Republic so it may not show in our system until a few days prior to departure." But even the flight that leaves in 2 days shows the same thing (no drinks, no snacks, nothing).

I'm going out on a limb and *assuming* there will be drinks, snacks, and a sad box (since E170 has no oven) but possibly catering out of LGA will be a slightly better cold/continental breakfast.

Not sure if menu.delta.com is normally throwing errors for any flight operated by Republic or not.