If a game is "Abandoned" it will show as such. Icstor gave notice, just after Christmas that he was taking a break "burnout" etc. Therefore the game would probably only show as "on hold", and as far as I recall it wasn't. He even posted on his Patreon page, as well as on Discord, what he was doing to "offset" the issue. Therefore the game info was left "as is". He also recently (end of July, beginning of August announced details with regards to this game and the latest update (V0.6) and as usual this forum went into meltdown. You name it and someone on here probably said it.
Currently the game is at 95%. That means this update is nearly ready for release. When at 100% it will go through bug testing etc and then be put out (DTBA, and that's what's annoying a lot of people too).
Also if a game gets abandoned there's also an option to be used, either by the Dev, assuming they know their game is listed on here, and that is there's generally a set time (someone will know what this is) as to when a game is listed as abandoned. The Mods on here will then list the game as such.
Plenty do get abandoned, due to varying reasons, games also get put on hold too, and then if nothing has happened for X amount of time, or the Dev gives details then it'll more than likely be listed as "Abandoned".
Yyou only have to use a search function to see the current list of Abandoned games.
Milfy City itself has gone through a far few versions of the game. It's out there in the ether. Someone will probably even say how many versions there are too.
List of Abandoned Games
https://f95zone.to/latest/#/cat=games/page=1/prefixes=22/nofixes=18,20
So to sum up.
Milfy City is defintely not abandoned (yet!!)
The game is even being worked at present.
Also the game has to be tested prior to release (then this lot can fap away as fast as they're able to the latest update of the game... and then start over with the same old Q&A's (again)
You can also find out more information about the game on Icstor's Discord Channel too. But beware what you ask on there, and don't mention this site, or pirate/ripped versions. Officially this game is only available via the Patreon page and paying members. Also it doesn't have an "official" version for Android either.
Hope this helps you out.