Hi (to whoever is reading this) I became a TRS after 1.5 years on Fiverr. I qualified on the 14th of July and was promoted the next day. I have read many posts about people not becoming TRS and so I thought I'd share my experience.
As others have said, this a manual selection process even if you meet all the criteria, but don't lose heart. Personally, I have maintained a 5 star rating since I began and I became a level 2 seller after 3-4 months on this platform. I always make sure to have the best customer service and to decline jobs and/or clients that I know will give me trouble. I'm not very active on the forum so I don't think that counts, but I do get quite a lot of orders every months so that might have played a factor in it.
All this is to say, just keep working hard and focus more on your reputation than remuneration. Your consistency will pay off. Good luck!