It will have to fit if it is talking about the same kingdom.
So ..........
If "flesh and blood" means a physical mortal ...... then no physical mortal can be in the kingdom, if it is talking about the same kingdom.
And then we have .....
John 18:36 KJV
(36) Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.
Jesus was still a flesh and blood man, and still in the world, when He spoke of this particular kingdom in verse 36 above.
So where is this kingdom?
Is every kingdom in all the verses we have used in this thread been talking about the same kingdom?
There are at least 154 verses in the NT that have the word "kingdom".
As you can see, it is difficult to make all the kingdom verses be about the same kingdom.
There is also ever the need to go beyond the study of a word or two, to the many interconnecting other words and to the interconnecting themes, such things are based on.
This is why some are able to rely mostly on Scripture alone - when such approach it in this way.
The rules of grammar the Greek or the Hebrew bring out can be a great aid in helping with such things as case, tense, mood, etc., in the absence of face to face contact with someone, where sameness in culture and subculture, and tones, and gestures, and facial expression, and all the rest, might make things a bit easier to grasp.
They ARE important for THEIR contribution to THAT.
But said rules of grammar are only a PART of the overall puzzle.
The overall narrative of Scripture is what drives intended meanings.
The thing to do then, during a word comparison, is to add to it, what else is being talked about where each same word is being used.
And what other words are being used.
The result being that one ends up all over the Scripture.
And as a result, that much more familiar with its overall landscape - where the hardware store is, should one need a hammer, down the road a bit.
Where the river is, should one's horse need a nice cool drink of water.
That kind of thing as a metaphor for the "world" of Genesis thru Revelation, in light of Romans thru Philemon.
People of THE Book are people of THE Book.
At the same time, the more one is of THE BOOK in this way, the greater the potential such a person will be misunderstood by anyone less of THE Book, in one way or another.
Or as Paul put that...
1 Corinthians 2:15 But he that is spiritual judgeth all things, yet he himself is judged of no man.