What are some reliable sources for checking airlines currently flying from Bangkok to the EU?

According to skyscanner Finnair flies to BKK. You go on their website and can make a booking for july. But if you dig deeper on the site you find out that unlike HK or Seoul etc, they haven't added bkk to their asian destinations for July, or August for that matter.

If I check AOT it redirects me to BKK, where checking arrivals/departures is the only thing that comes close. Unless I missed something?

What I'm actually after is a reliable official source that lists all said airlines. I've heard this one or that one flies from hear say, or friends flying out (Qatar, KLM, Air France)

And I've been checking skyscanner etc. But I'm a bit weary of airlines website as they have no problem advertising unlikely/speculative flights and taking your booking to later lock the funds in airline credit when they cancels. (Like Emirates would have done to me 2 weeks ago if I'd let them. Wanted to book a flight this month with a voucher from cancelled flight in March. They wanted me to pay fare difference and turns out they'not even flying..).