What are the immigration and visa requirements for a long transit in Bangkok with a flight change?

A traveler arriving in Bangkok from Delhi with a 20-hour transit must go through immigration to retrieve their cabin suitcase. This requires checking Thailand's entry regulations, including obtaining a Thailand Pass, a verified hotel booking at an SHA Extra+ hotel, and a PCR test upon arrival. Given that they will be entering Thailand to change flights, they cannot just transit without a visa. Suggestions were made to consider other routes to avoid complications.