Self custodial app that let business generate QR code of USDC payment

I saw the horrible user experience of Trump paying something with Bitcoin, and I start to think Ethereum definitely can do better. It should be just 2 seconds on L2 and 15 seconds on L1, cost $0.002 on L2 and $0.1 on L1.

Furthermore, Trump can use his favorite currency, USD, in the form of USDC. I know the end goal is to make ETH the main currency, but if the business want to receive USD, converting the amount to ETH just to convert it back to the expected amount of USD is pointless (just like the Trump video showed). It's great if the business want to receive ETH, the transaction fee would be lower too, but the current reality is most business will want to receive USDC over ETH.

I tried do demonstrate how much easier it would be to pay with USDC on Ethereum, but I couldn't find a self custodial wallet that can generates QR code of address, token (USDC), and amount. Most only has QR code for address. I think a good user experience would be, user only need to scan a QR code and click confirm, doesn't need to type anything.

Does that kind of app exist? I know there are centralized service like Coinbase Commerce or Binance Pay, but can't find any self custodial ones. I think it will be great for adoption.