On which platform can you do atomic swaps between BTC and ETH? I couldn't find anything online (maybe I need to look into it further).
For the security concerns I understand are something new and not intesively tested but even on well-known CEX there could be security concerns and limits, I guess.
I think you can use Cake Wallet, although I am not 100% certain it is a atomic swap in the strict sense of the word as a mechanism based purely on HTLC and LN (as with compatible blockchains such as Litecoin or Monero).