The macOS version of Legend of Xenia has been there since 19 April, 2016 😛 It was compiled by a friend, and I believe some people were having issues with it, so your mileage may vary.
HTML5 version of LoX2 could potentially happen at some point, if enough people pay for it like last year (LoX1 earned me about ~$50 from people randomly deciding to pay!) - the GMS2 HTML5 export is a little pricey and I can't really afford it right now though :l