How does ATLOS process non-EVM payments?

Hello, I have been researching and found ATLOS interesting, but it isn’t clear to me from a technical/eng pov how the service handles UXTO or non EVM chains, or otherwise non-smart contract chains in the VM sense.

Adding to that, I am further interested to know how chains like BTC or XMR can support subscriptions without smart contracts like how ERC20 generally works or any ETH onchain mechanism for recurring payments.

I, overall, am liking the premise of this service a lot, but a recurring problem in my research has been solving subscriptions.

Thanks.