Lightroom Classic 13.0.1 & Topaz Photo AI 2.0.6 import heic fails
Case 1 - HEIC
LRC rejects an heic file that was updated with Topaz Photo AI.
I selected a file in LRC and selected File -> Plug-in Extras -> Process with Topaz Photo AI. I updated the file in Topaz and selected save. The file was written to disk but LRC would not import the file and Adobe Bridge would not display it (double click opened the file in Photoshop)
I was able to import the file into the Apple Photos app on Mac Sonoma, I was also able to open with PHOTOSHOP Beta 25.2.0 as well as PHOTOSHOP 25.0.0

Case 2 - Right Clicking the photo and selecting Edit in -> Topaz Photo AI
This approach allowed me to use a TIFF file in Topaz, repair the photo and select Save. This worked as expected, the file was imported into LRC without issues.