Only if consent if given

For example, can I look at @liminal 🦠's nutsack to see if his is larger than mine or will the balances be encrypted?

As far as I understand, you would still only be able to see someone's public Cashu zaps. Cashu zaps could be encrypted using nip44 in which case you wouldn't see them. The receivers client would combine the public and private (nip44) balances

There a meme here with the classic template