Can a Thai visa be issued for multiple entries in one year?

Tourist visa is a single entry. :

A visa is an endorsement or stamp by a country’s sovereign authority on the passport or other travel documents held by its or foreign citizens to indicate that they are allowed to enter or exit the country’s territory or pass through the country’s territory. It can also be said that It is an endorsement-type certificate issued to them.

Visas are generally endorsed on the passport, and some are endorsed on other travel documents that replace the passport. Some also issue separate visas. For example, the immigration visa of the United States and Canada is a piece of A4-sized paper. Singapore also issues a separate visa to foreigners. Generally speaking, the visa must be used at the same time as the passport to be valid.

Visa is a measure taken by a sovereign country to safeguard its sovereignty, dignity, security and interests. Visa is an important means for a sovereign country to implement entry and exit management of its own borders. If a citizen of a country wishes to travel, settle, trade, study abroad, etc. in other countries, he or she must have a valid passport or travel document.