Yes you can eat 1 year old frozen meat.
As long as the meat has been frozen then the frozen meat can last 1 year to 2 years and sometimes longer depending on the meat.
I have kept meat frozen for longer than a year and it has been okay to eat after all that time.
Meat is still okay to eat well past it's use by or sell by date as long as it's been frozen.
When frozen the meat will not be able to grow bacteria and so it will keep longer because the bacteria cannot grow in the freezing temperatures of a freezer.
Meat will only keep for around 3 to 4 days in the refrigerator while in the freezer it keeps longer.
I have even kept frozen meat such as hamburger, chicken hot dogs etc in the freezer for 5 years and it's been okay to eat.