Should my mother apply for a visa or use the extension stamp for her visit to Thailand from Ukraine?

The user is inquiring about the best option for their mother traveling from Ukraine to Thailand in December. They are considering whether to utilize the extension stamp for a short visit or to apply for a tourist visa at the embassy. Responses indicate that she could enter Thailand on a Visa Exempt stamp for 30 days, which can be extended for an additional 30 days (totaling 60 days), or apply for a Single Entry Tourist Visa at the Thai Embassy that allows a 60-day stay, also extendable by 30 days (totaling 90 days). It's noted that due to current regulations, she will need to undergo a 7-day sandbox program upon arrival due to Ukraine's classification, with details given on the necessary health documents required for entry.