Can you set up Klarna / Afterpay / Affirm BNPL on my US Magento store?

Yes, all three have official Magento 2 modules. Affirm is the strongest US-native player (founded SF, 2012); their on-site messaging (“As low as $25/mo with Affirm”) on PDPs lifts AOV by 30-85% in our data. Klarna is bigger globally but very strong in US fashion / lifestyle. Afterpay (now Cash App Afterpay) leads in US under-30 demos. We typically wire 2 of the 3 + Apple Pay + Google Pay for full coverage. Risk + approval handled by the BNPL provider, not you.