I see that main IP address for YoMix is located in Russia, and that is the same location for Yobit exchange, and I saw similar connections with sberbank
One more interesting thing I saw on their website is that Yomix that you can't be identified that you used mixer if you use clean new address, and that you are safe.
I am not sure how exactly can they say something like this.
I tried to check whether you support Taproot address, but see this error after i click "Create order". For reference, i used Tor Browser and chose "Use recommended settings". And those Taproot address[1-2] are test vector from BIP 350[3].
[1] https://mempool.space/address/bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kt5nd6y
[2] https://mempool.space/address/bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kt5nd6y
[3] https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki#test-vectors-for-v0-v16-native-segregated-witness-addresses
Signature campaign will be launched soon, we're already working on it, but it takes a bit longer to launch due to holidays.
Cheers!