Yup! White-dot ointments, flowers, and blessed water. Here is a video of the blessing ceremony for the A359s HS-THO Khun Phuket and HS-THP Khun Phetchaburi:
The monk who presided over the ceremony is very senior, holding the rank somdet, somewhat equivalent to being in the Council of Cardinals for the Roman Catholic Church. Though I could not see any obvious palace representatives, somdets are royally-appointed so I suppose you could view this as a tacit royal-blessing. I do not think there is anyone from the namesake locales.

It is pretty cool to see how well-attended the ceremony is beyond the executives and extending to ground staff, mechanics, pilots, cabin crew, etc. I vaguely know a few people who work for TG and they seem to take a lot of pride in the airline, which probably explains this level of spiritual camaraderie. As a Thai, I think little traditions like this go pretty far in maintaining the identity of TG as the national airline. Even if complaining about TG is also quite the national past time, most of us still have a soft spot for the airline.