I'm curious: how are you going to find that with 546 (the minimum) sats in your wallet?

Just FYI: FixedFloat.com allows you to send (for instance) 0.03292 LTC to get 0.00002916 BTC. That's $4.50 in Litecoin, so it's possible. I don't know/use CashApp so I can't help you there.