Problem with my premiere pro 2023

In the Finder > right-click one of the clips and choose "Encode Selected Video Files".  It may appears under Services > Encode Selected Video Files.  When the Encode Media dialog box appears, choose Apple ProRes and then click Continue.  Depending on the length of the clip, this may take some time to complete.  The file will be large (about 1GB per minute of 1080p footage).  Try importing that into Premiere Pro.  If that works as expected, then you have a source file format issue.  Download Shutter Encoder (donation-ware) and use it to batch convert all of your clips to Apple ProRes 422 LT.  If you do not have enough drive space, use Apple ProRes 422 Proxy.

tell us what the source was for these clips?  Screen recordings and smartphone videos can be problematic because of variable frame rates.    Here's how to diagnose and fix this problem.
use mediainfo to determine whether your source is variable or constant frame rate
https://mediaarea.net/en/MediaInfo/Download
if it's variable use handbrake to convert to constant frame rate setting the quality slider in the video panel to maximum or use shutter encoder https://www.shutterencoder.com/en/ which allows you to transcode directly to prores or other mezzanine formats, just be sure to enable "edit media content" and turn off "frame by frame audio"

And if the sources are not variable frame rate, tell us what mediainfo says about the clips..