Me too. @supratic wrote a guide in the link above.

I had to swap in a tiny-ish utxo this weekend (it was not worth it to create a new channel) and decided to test Phoenix. It worked but felt a bit as if the whole thing was out of my hands during the entire process. "This will be spliced in when the feerate drops below 500sats/vb" made me look, lol

here the electrum swaps guide #1540674