Because of the corona virus, tourism has been restricted worldwide. Thailand has been keeping its borders closed to international tourists for months. The situation changes daily. An overview is constantly updated here.
The corona pandemic has been affecting global life for months. Thailand is not spared from this. [Editor's note: reported and actual cases differ very likely] Despite the low number of infections, the tourism industry including the associated economy comes to an abrupt halt.
The TravelBubbles only apply to some cities in Taiwan, Hong Kong, China, Japan, Korea, Vietnam, Myanmar Cambodia, New Zealand, Laos. These are treated preferentially. The virus is under control there. Possible solutions for entry for European tourists were not mentioned at all.