I will do my best to clarify.
I am asking if Luke's statement about the
'great distress' is referring to the same period as Matthew's and Mark's statement about the
'great tribulation/a tribulation'?
Luke says that this time of 'great distress' is when 'Jerusalem will be trampled on for the appointed times of the nations'.
So, the next question is, are
'the appointed times of the nations' the
42-months mentioned at Rev 11:2?
Luke 21:
20 “However, when you see Jerusalem surrounded by encamped armies,
+ then know that the desolating of her has drawn near.
+ 21 Then let those in Ju·deʹa begin fleeing to the mountains,
+ let those in the midst of her leave, and let those in the countryside not enter into her,
22 because these are days for meting out justice
* in order that all the things written may be fulfilled.
23 Woe to the pregnant women and those nursing a baby in those days!
+ For
there will be great distress on the land and wrath against this people.
24 And they will fall by the edge of the sword and be led captive into all the nations;
+ and
Jerusalem will be trampled on by the nations* until the appointed times of the nations* are fulfilled.+...25 “Also, there will be signs in the sun and moon and stars,
+ and on the earth anguish of nations not knowing the way out because of the roaring of the sea and its agitation.
26 People will become faint out of fear and expectation of the things coming upon the inhabited earth, for the powers of the heavens will be shaken.
27 And then they will see the Son of man
+ coming in a cloud with power and great glory.
+
Rev 11:
2 But as for the courtyard that is outside the temple sanctuary, leave it out and do not measure it, because it has been
given to the nations, and they will trample the holy city+ underfoot for 42 months.+
Matt 24:
15 “Therefore, when you catch sight of the disgusting thing that causes desolation, as spoken about by Daniel the prophet, standing in a holy place
+ (let the reader use discernment),
16 then let those in Ju·deʹa begin fleeing to the mountains.
+ 17 Let the man on the housetop not come down to take the goods out of his house,
18 and let the man in the field not return to pick up his outer garment.
19 Woe to the pregnant women and those nursing a baby in those days!
20 Keep praying that your flight may not occur in wintertime nor on the Sabbath day;
21 for then
there will be great tribulation such as has not occurred since the world’s beginning until now, no, nor will occur again.
+ 22 In fact, unless those days were cut short, no flesh would be saved; but on account of the chosen ones those days will be cut short.
+...
29 “Immediately after the tribulation of those days, the sun will be darkened,
+ and the moon will not give its light, and the stars will fall from heaven, and the powers of the heavens will be shaken.
+ 30 Then the sign of the Son of man will appear in heaven, and all the tribes of the earth will beat themselves in grief,
+ and they will see the Son of man
+ coming on the clouds of heaven with power and great glory.+
Mark 13:
14 “However, when you catch sight of the disgusting thing that causes desolation
+ standing where it should not be (let the reader use discernment), then let those in Ju·deʹa begin fleeing to the mountains.
+ 15 Let the man on the housetop not come down nor go inside to take anything out of his house;
16 and let the man in the field not return to the things behind to pick up his outer garment.
17 Woe to the pregnant women and those nursing a baby in those days!
+ 18 Keep praying that it may not occur in wintertime;
19 for those days will be days of
a tribulation such as has not occurred from the beginning of the creation that God created until that time, and will not occur again.
+ 20 In fact, unless Jehovah
* had cut short the days, no flesh would be saved. But on account of the chosen ones whom he has chosen, he has cut short the days.... 24 “But in those days, after that tribulation, the sun will be darkened, and the moon will not give its light,
+ 25 and the stars will be falling out of heaven, and the powers that are in the heavens will be shaken.
26 And then they will see the Son of man
+ coming in the clouds with great power and glory.
+