PDAL support for .laz files including 'full waveform data'

[Sam-FDL]

I installed this package to be able to access the new point cloud processing tools, which don't appear on the standalone install of 3.36 from the QGIS website. Unfortunately I am now unable to open the pointcloud I want to use. I am able to open other .laz files. The error message I get is:
Invalid Data Source : /Path/to/my_file.laz is not a valid or recognized data source, error: "readers.las: Global encoding WKT flag not set for point format 6 - 10."
The .laz file I want to use does open up on the standalone install of 3.36 (which includes PDAL 2.3.0).
Using the terminal for the command: pdal info /Path/to/my_file.laz
I get the response: command not found: pdal
But PDAL does seem to be working as I can load other .laz files and use all point cloud processing tools on them.
I have come across a similar issue using cloudcompare - the same files will and won't open - and some investigation suggests that the files that won't open are those that include "full waveform data".
Any suggestions of how to resolve this, or fixes in future packages, would be well appreciated.
The data in question is UK Govt Environment Agency National Lidar Programme Pointcloud .laz files published after at least January 2022 (a file from March 2021 does work). I would upload a sample, but the files are too big, and won't open in the programmes I could use to crop them smaller.