Booked a flight through Trip.com but noticing some red flags?

Generally, I try to avoid OTAs, but I've heard that Trip.com is good for domestic travel in China. I've been using it to book hotels and everything seems good so far, but I just booked my first domestic flight and am noticing some red flags.

I saw a flight from Harbin to Shanghai via Juneyao Air on Trip.com and booked it there. My ticket was successfully confirmed/issued by Trip.com.

However, when I try to manage my booking on Juneyao's website, I can't access my booking. I'm unsure if it's a technical issue or a legitimate issue with my booking.

Secondly, I can't find the flight when I try to look it up on their search tool. Like the flight doesn't even exist on that day.

But when I manually enter the flight details to check its status, it does show up.

What should I do?