No. Galaxy A50 has 2 dedicated 4G sim card slots and a dedicated MicroSD card slot. So, you can use 2 sim cards and a MicroSD card at the same time.
No. Samsung Galaxy A50 does not have the LED notification light but it does have the Always-on display, so you can get notification alerts by any ways.
During our test review, we got 145,408 AnTuTu score for Galaxy A50.
Yes, Galaxy A50 does support FM radio.
Yes, Samsung Galaxy A50 does have a 3.5 mm headphone jack.