You got two choices based on what you've been saying. You can either pay the fees to transfer the real Bitcoin, which I think is the best way to go. The other option is to turn your Bitcoin into some crapcoin, send that crapcoin to Trust Wallet, and then convert it back to real Bitcoin there.

From what I've seen, Trust Wallet does have swap services, but it might end up costing you more to mess around with crapcoins bouncing all over the place. Just pay the 20k sats and send it to Electrum. That's the best advice I can give you.