UA B757-200 BF seats question

Hi,
I am new here. I have a trip April 8 EWR to LIM flight 1095
April 14 LIM to EWR, flight 1005

I am considering to use miles to upgrade to BF.
the question is: are the BF seats on these flight lay flat?

25k miles + $125 each way. I am Gold, so I am in Eco Plus seat right now.
if those BF seats dont lay flat, I dont think I will upgrade flying out.

Thanks