Layer 2 solutions, particularly those controlled by multi-sig wallets, could be deemed brokers and required to implement KYC due to their ability to modify protocol parameters.
"The proposal notes that anyone who can modify the parameters of a crypto project or protocol are able to collect kyc for tax purposes as pointed out on Twitter or rather X by a crypto sleuth named spreak the treasury's wording around this ability to modify parameters means that quote anything with a multi-sig wallet is a broker and is required to add kyc consider that most ethereum layer twos are controlled by multi-sig wallets"