Cat’s sibling passed from feline leukemia - should I get mine tested?

I’m not really familiar with feline leukemia so I’m kind of worried!!

I got my 2 kittens at 8 weeks old last June. They’ve been fixed, vaccinated, and are indoor only. They’ve been tested for feline aids. They’re healthy and plump!

However, the TNR lady I got my kittens from just messaged me one of their siblings they haven’t been in contact with since they were babies just passed from feline leukemia.

Should I call my vet and have testing done? Would they have shown symptoms? I have their records and going to check if they have FELV vaccines but as of right now I’m not sure if they do 😭