Question: Can foreign tourists cruise to the country between the nation that hosted 2020 AFC U-23 Championship qualification and the one that contains A Don.?

Knowledge 1: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. [SEP] Knowledge 2: A Don
A Don is a village in south-eastern Laos near the border with Vietnam. It is located in Kaleum District in Sekong Province. [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: Myanmar
The most common way for travellers to enter the country seems to be by air. According to the website Lonely Planet, getting into Myanmar is problematic: "No bus or train service connects Myanmar with another country, nor can you travel by car or motorcycle across the border – you must walk across.", and states that, "It is not possible for foreigners to go to/from Myanmar by sea or river." There are a small number of border crossings that allow the passage of private vehicles, such as the border between Ruili (China) to Mu-se, the border between Htee Kee (Myanmar) and Ban Phu Nam Ron (Thailand) (the most direct border between Dawei and Kanchanaburi), and the border between Myawaddy (Myanmar) and Mae Sot (Thailand). At least one tourist company has successfully run commercial overland routes through these borders since 2013. "From Mae Sai (Thailand) you can cross to Tachileik, but can only go as far as Kengtung. Those in Thailand on a visa run can cross to Kawthaung but cannot venture farther into Myanmar."
Knowledge 1: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. [SEP] Knowledge 2: Myanmar
The most common way for travellers to enter the country seems to be by air. According to the website Lonely Planet, getting into Myanmar is problematic: "No bus or train service connects Myanmar with another country, nor can you travel by car or motorcycle across the border – you must walk across.", and states that, "It is not possible for foreigners to go to/from Myanmar by sea or river." There are a small number of border crossings that allow the passage of private vehicles, such as the border between Ruili (China) to Mu-se, the border between Htee Kee (Myanmar) and Ban Phu Nam Ron (Thailand) (the most direct border between Dawei and Kanchanaburi), and the border between Myawaddy (Myanmar) and Mae Sot (Thailand). At least one tourist company has successfully run commercial overland routes through these borders since 2013. "From Mae Sai (Thailand) you can cross to Tachileik, but can only go as far as Kengtung. Those in Thailand on a visa run can cross to Kawthaung but cannot venture farther into Myanmar." [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: A Don
A Don is a village in south-eastern Laos near the border with Vietnam. It is located in Kaleum District in Sekong Province.
Knowledge 1: 2020 AFC U-23 Championship qualification
Of the 47 AFC member associations, a total of 44 teams entered the competition. The final tournament hosts Thailand decided to participate in qualification despite having automatically qualified for the final tournament. [SEP] Knowledge 2: Myanmar
The most common way for travellers to enter the country seems to be by air. According to the website Lonely Planet, getting into Myanmar is problematic: "No bus or train service connects Myanmar with another country, nor can you travel by car or motorcycle across the border – you must walk across.", and states that, "It is not possible for foreigners to go to/from Myanmar by sea or river." There are a small number of border crossings that allow the passage of private vehicles, such as the border between Ruili (China) to Mu-se, the border between Htee Kee (Myanmar) and Ban Phu Nam Ron (Thailand) (the most direct border between Dawei and Kanchanaburi), and the border between Myawaddy (Myanmar) and Mae Sot (Thailand). At least one tourist company has successfully run commercial overland routes through these borders since 2013. "From Mae Sai (Thailand) you can cross to Tachileik, but can only go as far as Kengtung. Those in Thailand on a visa run can cross to Kawthaung but cannot venture farther into Myanmar." [SEP] Knowledge 3: Geography of Myanmar
Myanmar (also known as Burma) is the northwestern-most country of mainland Southeast Asia, bordering China, India, Bangladesh, Thailand and Laos. It lies along the Indian and Eurasian Plates, to the southeast of the Himalayas. To its west is the Bay of Bengal and to its south is the Andaman Sea. It is strategically located near major Indian Ocean shipping lanes. [SEP] Knowledge 4: 2017 FIFA Confederations Cup
Russia was announced as the hosts on 2 December 2010 after the country was awarded the hosting rights of the 2018 FIFA World Cup. The matches were played in four different stadiums across four cities: Saint Petersburg, Moscow, Kazan, and Sochi. It was the first time Russia has hosted the tournament, and the third time the Confederations Cup has been held in the European continent. As hosts, Russia qualified automatically for the tournament; they were joined by the six winners of the FIFA confederation championships and the 2014 FIFA World Cup champions, Germany.

Answer: It is not possible for foreigners to go to/from Myanmar by sea or river.