Treatment for grave hyperthyroid.

I have been suffering with grave hyperthyroid and Atrial Fibrillation for 2 years and 3 months. I started with 45 mg of neomarcazole per day when at the beginning when my tsh was 0.0015. For last 4 months my all 3 - (tsh, t3, t4) are in normal range. I have been taking Neomarmarzole 10 mg/day since 28 November 2022. I got total thyroid profile test yesterday from Tata 1 mg lab yesterday. My TSH is 2.491 My T3 is 0.94 My T4 is 7.0 Question 1: I heard that grave hyperthyroid is cured in 2 years in 40 percent cases. Am i cured now as my all 3 are in normal range for last 4 months with 10 mg nmz. Question 2:. Can I reduce the dose to 5mg nmz/day or 7.5 mg/day? Will my thyroid remain in normal range? Question 3: Is there any test to check whether thyroid is cured or not? Please answer all 3 questions? I am feeling fine with no symptoms of thyroid.