Video transition not working when two clips are from same video file

Thanks everyone, I understand the issue better now. The problem is I transitioned from using Capcut to Premier Pro in the middle of this project. Here's what I did:

1. Made a first round of cuts in Capcut

2. Exported an mp4 file from Capcut

3. Imported the mp4 file into Premier

4. Made cuts in Premier (at the same points where I had made cuts in Capcut), and did not cut frames out (which @R Neil Haugen said would not work).

5. Unsuccessfully tried to add Cross Dissolve transitions

I'm thinking the only way to make this work is to grab the original footage and redo these sections so I have clip handles to work with. Unless there is another solution or another type of transition (besides Cross Dissolve) that could potentially work? Anyone have any ideas?

See here, too:

https://helpx.adobe.com/premiere-pro/using/transition-overview-applying-transitions.html

The transitions do work but you are not seeing it.

There is no point dropping a transition between a cut from the same video without trimming back the ends.

The transition will play the same frames.

Transitions need handles to work properly.

Adobe Premiere Pro Help | Transition overview: applying transitions

Did you actually cut some frames out? Or just make a cut in the clip?

Because if the later, there aren't going to be any "handles" for a cross-dissolve to use.