Little explanation.

what we know: if we have two outputs:) if one , it doesn't matter.

1.  We know:

a. partial WIF of privatekey
b. r1,s1,z1 and r2,s2,z2  ( two transactions)

2. What we can do?

a. first we must re-arrange the transactions outputs as : nonce is privatekey, and privatekeys is a nonce.!  -> yes we can

b. we know partial WIF of privatekey as nonce - we can use Monte Carlo together with LLL

c. recentering for partial integers plus BKZ or LLL.

becouse: IF OP has partial WIF example knowns MSB , not known middle, and Known LSB - it is easy even for 23 missing characters.