CoinOS gives you 3 options for receiving:
Lightning on-chain Liquid
You might have to elaborate a little. I'm not sure if that answered my question or not. If I receive on-chain, is it easy to spend those sats in a lightning transaction?
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They have support on Telegram
Here is the answer from the founder of CoinOS:
Yes if you deposit into Coinos on-chain you can withdraw over Lightning or Liquid and it will just work, you don't need to do anything special to convert the funds beforehand. You'll be charged a 0.1% fee for the conversion.
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Very cool!
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