Not an abomination of desolation that was set up in the Temple-yet.
11And from the time that the daily sacrifice shall be taken away, and the abomination that maketh desolate set up, there shall be a thousand two hundred and ninety days.
The desolation right in the midst of the 7 year tribulation period.
The altar was profaned and the abomination was “set up”. Read the OT prophets. It’s not a big mystery and neither is Daniel