I applied for my TR Visa on April 24th, 2023. I reserved an hotel for 15 days and I took a screenshot of my Agoda reservation email which showed my full name, dates I’m staying and hotel name and address in the the screenshot.
as long as you show proof of reservation for your stay in Thailand, you’re fine. I uploaded a 15 day stay reservation (wasn’t fully paid, only reserved pay later option) and my TR Visa was still approved. They just want to see proof you actually have or plan to have accommodation in Thailand, you don’t need to fully pay. The email you receive from Agoda is enough